h igh energy h igh intensity h adron beams

Name Event Date1

CERNW. Scandale & F. Zimmermann HHH, CARE Meeting, CERN,17.09. 2008

High EnergyHigh IntensityHadron Beams

http://care-hhh.web.cern.ch/care-hhh/

HHHHHHHHHHHH Networkcoordinated by W. Scandale and F. Zimmermann

Name Event Date2

CERN

HHHHHHHHHHHHoutlineHHH overviewactivities in 2008LHC upgrade scenariosHHH workshops & resultsdeliverables & milestonesrecent publicationsHHH exchanges & resultscrystal-collimation studiestwo HHH highlights

Name Event Date3

CERN

HHHHHHHHHHHH

W. Scandale & F. Zimmermann HHH, CARE Meeting, CERN, 17.09. 2008

CARE-HHH networkCoordinate and integrate the activities of the accelerator and particle

physics communities in a worldwide context, towards achieving superior High-Energy High-Intensity Hadron Beam facilities for Europe

road map for the upgrade of the European accelerator infrastructure (LHC and GSI accelerator complex)

coordinate activities and foster future collaborations dissemination and outreach

WP1: Advancements in Accelerator Magnet Technologies (AMT)WP2: Novel Methods for Accelerator Beam Instrumentation (ABI)WP3: Accelerator Physics and synchrotron Design (APD)

Participating institutes: CEA, CERN, CSIC-CIEMAT, CCLRC, DESY, GSI, INFN, PSI, TEU, WUTAssociated institutes: CRPP, ENEA, TUBE, ESRF, UPSA, FZK, TEMF, US-LARP (BNL,FNAL,LBNL,SLAC), JINR, IHEP, KEKAdditional collaborations: Texas A&M U., U. Geneva, U. Bologna

Name Event Date4

CERN

HHHHHHHHHHHH


activities in 2008past & planned events:3 main workshops (one per WP) [1 DONE, other 2 in November]1 joint HHH/US-LARP/BNL workshop on crab cavities 4 topical HHH workshops (for APD): crab cavities, long-range beam-beam

effects & beam-beam compensation, crystal collimation, electron cloud [2 DONE]

participation in other international workshops & events:JPS meeting, Osaka, March 2008, invited presentation on LHC and the LHC upgrade [DONE]ICFA Beam Dynamics Mini-Workshop on deflecting/crabbing cavity applications in

accelerators, Shanghai April 2008; Yi-Peng Sun,HHH fellow at CERN, presented the LHC crab cavity effort with HHH support [DONE]

INFN Group-1 meeting in Pisa, September 2008EPAC08, HB2008,…International workshop on Multipactor, Corona and Passive Intermodulation, "Mulcopim",

Valencia September 2008, organized by ESA; the workshop will address electron-cloud effects and their prevention in spacecrafts and accelerators; HHH will send 3 persons

Channeling 2008, Erice, November 2008. The workshop will address crystal-particle interaction phenomena

Name Event Date5

CERN

HHHHHHHHHHHH


activities in 2008 cont’d

exchanges and education: visits of CERN accelerator physicists to other labssupport of EU or non-EU (US, J, Russia,...) scientists for visits to CERN support of one PhD student and of two summer students working for the SC

database

dissemination and outreach: various events/workshops organized by/with physicists from LHC

experiments, e.g.presentation for LHCb Upgrade working group August 2008; participation in, and presentation at, “Physics at CMS” workshop, Split 25 Sept.-3 Oct.

2008; involvement of experiments’ representatives in HHH workshops

contributions to EPAC’08, HB2008, and other events; seminars at EU universities

further extensions of SC & accelerator physics codes databasesmaintenance and development of HHH web sites

Name Event Date6

CERN

HHHHHHHHHHHHLHC upgrade stages“phase-1” 2013:

new triplets, D1, TAS, b*=0.25 m in IP1 & 5,reliable LHC operation at ~2-3x luminosity;beam from new Linac4

“phase-2” 2017:target luminosity 10x nominal, possibly Nb3Sn triplet & b*~0.15 m

complementary measures 2010-2017: e.g. long-range beam-beam compensation, crab cavities, new/upgraded injectors, advanced collimators, lower emittance, coherent e- cooling??, e- lenses??

longer term (2020?): energy upgrade, LHeC,…phase-2 might be just phase-1 plus complementary measures

+ injector upgrade

Name Event Date7

CERN

HHHHHHHHHHHHLHC upgrade paths

F. Zimmermann & W. Scandale HHH, CARE’07, CERN, October 29-31, 2007

stronger triplet magnets

D0 dipole

small-angle

crab cavity

early separation (ES)stronger triplet magnets

small-angle

crab cavity

full crab crossing (FCC)

wirecompensator

larger-aperture triplet magnetslarge Piwinski

angle (LPA)

reviewed by LHCC, 1 July 2008

New!

parameter symbol nominal ultimate Early Sep. Full Crab Xing L. Piw Angletransverse emittance e [mm] 3.75 3.75 3.75 3.75 3.75protons per bunch Nb [1011] 1.15 1.7 1.7 1.7 4.9

bunch spacing Dt [ns] 25 25 25 25 50beam current I [A] 0.58 0.86 0.86 0.86 1.22longitudinal profile Gauss Gauss Gauss Gauss Flatrms bunch length sz [cm] 7.55 7.55 7.55 7.55 11.8beta* at IP1&5 b* [m] 0.55 0.5 0.08 0.08 0.25full crossing angle qc [mrad] 285 315 0 0 381Piwinski parameter f=qcsz/(2*sx*) 0.64 0.75 0 0 2.0hourglass reduction 1.0 1.0 0.86 0.86 0.99peak luminosity L [1034 cm-2s-1] 1 2.3 15.5 15.5 10.7peak events per #ing 19 44 294 294 403initial lumi lifetime tL [h] 22 14 2.2 2.2 4.5effective luminosity (Tturnaround=10 h)

Leff [1034 cm-2s-1] 0.46 0.91 2.4 2.4 2.5Trun,opt [h] 21.2 17.0 6.6 6.6 9.5

effective luminosity (Tturnaround=5 h)

Leff [1034 cm-2s-1] 0.56 1.15 3.6 3.6 3.5Trun,opt [h] 15.0 12.0 4.6 4.6 6.7

e-c heat SEY=1.4(1.3) P [W/m] 1.07 (0.44) 1.04 (0.59) 1.04 (0.59) 1.04 (0.59) 0.36 (0.1) SR heat load 4.6-20 K PSR [W/m] 0.17 0.25 0.25 0.25 0.36image current heat PIC [W/m] 0.15 0.33 0.33 0.33 0.78gas-s. 100 h (10 h) tb Pgas [W/m] 0.04 (0.38) 0.06 (0.56) 0.06 (0.56) 0.06 (0.56) 0.09 (0.9)extent luminous region sl [cm] 4.5 4.3 3.7 3.7 5.3comment nominal ultimate D0 + crab crab wire comp.

larg

e Pi

win

ski a

ngle

(LPA

)

full

crab

cro

ssin

g (F

CC)

early

sep

arat

ion

(ES)

Name Event Date9

CERN

HHHHHHHHHHHH


experimenters’ choice(LHCC July 2008)

no accelerator components inside detectorlowest possible event pile uppossibility of easy luminosity levelling

→ full crab crossing upgradeNew!

Name Event Date10

PSB

SPS SPS+

Linac4

(LP)SPL

PS

LHC / SLHC DLHC

Out

put e

nerg

y

160 MeV

1.4 GeV4 GeV

26 GeV50 GeV

450 GeV1 TeV

7 TeV~ 14 TeV

Linac250 MeV

(LP)SPL: (Low Power) Superconducting Proton Linac (4-5 GeV)

PS2: High Energy PS(~ 5 to 50 GeV – 0.3 Hz)

SPS+: Superconducting SPS(50 to1000 GeV)

SLHC: “Superluminosity” LHC(up to 1035 cm-2s-1)

DLHC: “Double energy” LHC(1 to ~14 TeV)

Proton flux / Beam power

present and future LHC injectors

PS2

Roland Garoby, LHCC 1July ‘08

layout of the new injectorsSPS

PS2

SPL

Linac4

PS

R. Garoby, CARE-HHH BEAM07, October’07; L. Evans, LHCC, 20 Feb ‘08

forecast peak & integrated luminosity evolution

Collimation phase 2

Linac4 + IR

upgrade

phase 1

New injectors + IR

upgrade

phase 2

ATLAS will need ~18 months

shutdown

Goal for ATLAS Upgrade:3000 fb-1 recorded

cope with ~400 pile-up events each BC M. Nessi, CARE-HHH LHC crab-cavity validation mini-workshop August 2008, R. Garoby, LHCC July 08

Name Event Date13

HHHHHHHHHHHHlower beam emittance• can compensate for luminosity loss due to

large crossing angle [R. Garoby]

• may be provided by new injectors• and/or by “coherent e- cooling” [V. Litvinenko]

CeC proof-of-principleexperimentat RHIC in2012

damping times in hours:

promise of 1-hr damping time at 7 TeV!

New!

Name Event Date14

HHHHHHHHHHHHstrategy for “phase 2”pursue vigorous R&D program for larger-aperture

higher-field magnets parallel crab-cavity development and testing design, production & installation of wire

compensator already in phase-0 exploration of complementary schemes, like crab

waist, coherent e-cooling, e-lenses, crystal collimation; integrate them into upgrade plan when they become available

establish generation method long flat bunches identify main limitations of the real LHC LHC machine studies to explore upgrade

scenarios, e.g. large Piwinski angle close coordination with detector upgrades

Name Event Date15

CERN

HHHHHHHHHHHH


workshops since CARE07• 19-20 November: CARE-HHH-AMT workshop on Heat

Generation and Heat Transfer in Superconducting Magnets (THERMOMAG’07), Paris, 2 days (about 70 participants)

• minimizing and evacuating heat in the next generation of superconducting magnets for high intensity particle accelerators, such as the IR magnet for the LHC luminosity upgrade and the fast cycling magnets for FAIR and for the LHC injector chain upgrade;

• identify the state of the art on

(1) cooling techniques (fluids and regimes), (2) heat transfer mechanisms, (3) modeling of heat transfer from coils to cooling system, (4) heat transfer experiments; identify a common set of thermal design criteria

http://care-hhh.web.cern.ch/CAREHHH/Workshops/ProgThermomag.htm

http://care-hhh.web.cern.ch/CAREHHH/Workshops/

Name Event Date16

CERN

HHHHHHHHHHHH


workshops since CARE07• 5th CARE-HHH-ABI workshop on Schottky, Tune and

Chromaticity Diagnostic (with real time feedback) (about 30 participants), Chamonix, France, 11 - 13 December 2007, supported by HHH

• Joint BNL/CARE-HHH/US-LARP workshop on LHC crab cavities (LHC-CC08), BNL, 25-26 February 2008 (about 30 participants) - 3 persons attended with HHH support

http://adweb.desy.de/mdi/CARE/chamonix/abi_workshop_2007.htmresults on online tune & chromaticity measurementspreparation for an overall orbit, tune & chromaticity control at LHCdeformation of Schottky sidebands due to space charge

http://prst-ab.aps.org/pdf/PRSTAB/v11/i7/e074202

http://indico.cern.ch/conferenceDisplay.py?confId=24200

http://adweb.desy.de/mdi/CARE/chamonix/abi_workshop_2007.htm



http://adweb.desy.de/mdi/CARE/chamonix/abi_workshop_2007.htm


Name Event Date17

CERN

HHHHHHHHHHHH


AMT workshop • 19-23 May: CARE-HHH-AMT workshop on Accelerator

Magnets, Superconductor, Design and Optimization (WAMSDO’08), CERN, 5 days, 107 participants

• Main topics:• summary of magnet targets and specifications for future accelerators and

accelerator upgrades, in particular for the LHC upgrade; • advances on low- and high-Tc s.c. materials and cables, with special

attention to progress in Nb3Sn, low-loss Nb-Ti and coated conductors; • design, optimization and R&D for s.c. magnets and other devices, in

particular the high field dipoles and quadrupoles for the LHC IR and fast cycled synchrotron magnets.


Name Event Date18

CERN

HHHHHHHHHHHH


Deflecting Cavity WorkshopICFA Beam Dynamics Mini-Workshop on Deflecting/Crabbing Cavity Applications in AcceleratorsApril 23-25, 2008 at SINAP, Shanghai

Topics:deflecting/crabbing cavity R&D in the applications of: high energy colliders (ILC, LHC,

KEK-B, CLIC, …) generation of short x-ray pulse in

synchrotron light sources beam manipulations, emittance

exchanges and diagnosticshttp://www.sinap.ac.cn/ICFA2008/index.htm

http://www.sinap.ac.cn/ICFA2008/index.htm

Name Event Date19

CERN

HHHHHHHHHHHH

F. Zimmermann & W. Scandale HHH, CARE Meeting, CERN, 17.09. 2008

CARE-HHH-APD Mini-Workshop on LHC Crab-Cavity Validation, CERN , 21 August 2008 http://indico.cern.ch/conferenceDisplay.py?confId=38210

CARE-HHH-APD Working Meeting on LHC Beam-Beam Effects & Beam-Beam Compensation, CERN , 28 August 2008http://indico.cern.ch/conferenceDisplay.py?confId=38353

CARE-HHH Workshop HHH-2008: Scenarios for the LHC Upgrade and FAIR, near CERN, 24-25 November 2008CARE-HHH-APD Mini-Workshop on Electron-Cloud Mitigation, CERN, November 2008 CARE-HHH-APD Mini-Workshop on Crystal Collimation, CERN, November 2008CARE-HHH-ABI Workshop on Transverse and Longitudinal Emittance Measurement, GSI, November 2008

HHH workshop series summer and fall 2008



Name Event Date20

CERN

HHHHHHHHHHHH

x

zcRssqf

ff 2

;1

12

= “Piwinski angle”

luminosity reduction factorwithout crab cavity

nominal LHC

qc/2

effective beamsize s→s/Rf

crab cavity motivation

“LPA” upgrade

“FCC” upgrade

HHHHHHHHHHHHCARE-HHH LHC Crab Cavity Validation

Mini-Workshop, 21 August 2008

Bob Palmer

invention 1988

crabbed beams in KEKBfirst use in operating

ring collider 2007

LHC global crab

LHC local crab

global & local schemes considered for LHC

KEKB experience R&D plan phased approach: (1) prototype(2) “global” crab cavity

test in IR4, (3) “local” crab cavities

in IR1 & 5 EuCARD, US-LARP

& international collaboration

New!

Name Event Date22

CERN

HHHHHHHHHHHH


crab-cavity prototype tentative schedule

T. Linnecar, HHH Crab-Cavity Validation WorkshopNew!

0.25 0.26 0.27 0.28 0.29 0.3 0.31 0.32 0.33-0.05

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

Nowire

Uncompensated

Compensated

vertical tune

rela

tive

beam

loss

long-range beam-beam compensationLR beam-beam in LHC

prototypecompensatorin the SPS

New!

8 10 12 14 16 18 20 22 24 261

10

100

1000

10000

f(x) = 0.00796694083402641 exp( 0.527530983206699 x )R² = 0.969563974789019

f(x) = 0.032121851154027 exp( 0.263290043375057 x )R² = 0.916491915902518

f(x) = 0.00466317125207914 exp( 0.631317040232308 x )R² = 0.897733587640435.32 .29

Exponential (.32 .29).234,.226Exponential (.234,.226).12 ..16Exponential (.12 ..16)

distance [mm]

inverse relative loss at various tunes

New!G. Sterbini, J.-P. Koutchouk U. Dorda, et al, SPS MD August 2008

(s~1.3 mm)

vacuummodule

vacuum module

1st stage

2nd stage~70 K

~10 K

RT 80 K 15 K 15 K 80 K RT

Technical vacuum

Technical vacuum

WC Transition WC Transition

Thermal screen (~80 K)

L ~4 m (including vacuum modules)Lcryostat ~2.5 mH ~1.2 m

TOT

TOT

1500

650 650

500 500

150

I I

80 K

cryostat around cold beam pipe

two-stage pulse tube cryocooler

Ic (A

)

B (T)

Ex-situ, 1.1 mm MgB2 wire (Columbus)

MgB2 conductor

high-Tc s.c. compensatorA.Ballarino, CARE-HHH mini-workshop, 28 August 2008

New!

Name Event Date25

HHHHHHHHHHHHelectron lensuse of e-lens as tune-spread compressor improves simulated LHC beam lifetime (phase to IP important)

A.Valishev,CARE-HHHmini-workshopon beam-beam Compensation,28 August 2008

New!

Name Event Date26

CERN

HHHHHHHHHHHH


Mulcopim 2008

meeting place for researchers, designers, test engineers and users of any space high-power RF hardware

design and testing of high power RF hardware for the prevention of RF breakdown (Multipactor and Corona) and Passive Intermodulation

main topics:

international workshop on Multipactor,Corona,&Passive Intermodulation Valencia, 24-26 Sept.’08, organized by European Space Agency (ESA)

• high power RF hardware design • innovative testing techniques (facilities, detection methods, etc...) • theoretical investigations in the multipactor physics • surface coating & secondary emission: measurements and theory • simulation and prediction tools • multicarrier operation • electron cloud effects • multipactor in particle accelerators • power and frequency trends • harmonisation and standardisation

http://www.cfp.upv.es/mulcopim08

http://www.cfp.upv.es/mulcopim08/inicio/index.html

Name Event Date27

HHHHHHHHHHHHEvaporation of metals in relatively high pressure of a rare gas produces very rough and porous films. Already mentioned in the literature, “gold black” has been produced and characterized.

Gold black deposited by evaporation in Kr (0.5 mbar)

e-cloud mitigation

for PS2 and SPS upgrade; effort triggered by HHH ECL’2 workshop

P. Chiggiatoet al

promising:graphite coating on black gold substrate

no dependence on time of exposure to air

a-C on gold black

0,0

0,2

0,4

0,6

0,8

1,0

1,2

1,4

0 200 400 600 800 1000 1200 1400 1600 1800 2000Primary Electron Energy [eV]

SEY Ne

w!

Name Event Date28

CERN

HHHHHHHHHHHH


deliverables & milestonesdeliverables

2004: HHH & HHH-APD web sites => OK2005: creation of first web-based beam dynamics code repository => OK http://oraweb.cern.ch:9000/pls/hhh/code_website.startup2007: web based database for s.c. cables and magnets concluded http://sdb.web.cern.ch/sdb=> OK 2008: final report – after final workshop

milestones:web reference for IR optics => OKhttp://care-hhh.web.cern.ch/care-hhh/SuperLHC_IRoptics/IRoptics.html booster synchrotron optics => in progressstructured list of intensity limits => OKhttp://care-hhh.web.cern.ch/care-hhh/Intensity%20Limits/intensity-limits.htm scaling laws for magnet and cryogenic cost => 2008

2 summer students+ 1 doctoral studentfor further updates

http://oraweb.cern.ch:9000/pls/hhh/code_website.startup

http://sdb.web.cern.ch/sdb

http://care-hhh.web.cern.ch/care-hhh/SuperLHC_IRoptics/IRoptics.html

http://care-hhh.web.cern.ch/care-hhh/Intensity%20Limits/intensity-limits.htm

Name Event Date29

CERN

HHHHHHHHHHHH


recent publications & presentations, end of 2007

S. Hasan, Bent Silicon Crystals for the LHC Collimation: Studies with an Ultrarelativistic Proton Beam, Master Thesis, U of Insubria, CARE-Thesis-07-002

L. Rossi and E. Todesco, Electromagnetic design of superconducting dipoles based on sector coils, submitted to Phys. Rev. ST Accel. Beams 10, CARE-Pub-2007-012

I. Santiago Gonzalez, Loss of Longitudinal Landau Damping in the LHC Injectors, CARE-Note-2007-012-HHH

F. Zimmermann, W.Scandale, Summary of IR07 Workshop, LHCU mtg, 28.11.2007 F. Zimmermann, W.Scandale, Summary of IR07 Workshop, LIUWG mtg, 29.11.2007 F. Zimmermann, W. Scandale, Summary of BEAM'07 Workshop, Summary of IR07

Workshop, PAF meeting, 3.12.2007 L. Bottura, R. Maccaferri, C. Maglioni, V. Parma, G. de Rijk, L. Rossi, W. Scandale, L.

Serio, D. Tommasini, Conceptual Design of Superferric Magnets for PS2 , CARE-Note-2007-019-HHH

M. Pivi, Electron Cloud R&D for Future Linear Colliders, CERN, AP Forum, 20 March 2008; M. Pivi, CMAD Simulation Code Status, CERN discussion, 19 March 2008

F. Zimmermann, Status, Schedule and Future of LHC Accelerator, JPS Meeting, Osaka, Kinki University, 24 March 2008

W. Scandale et al, Collimation with Bent Crystals: the H8RD22 Experiment, CARE-Note-2007-020-HHH

Name Event Date30

CERN

HHHHHHHHHHHH


recent publications & presentations, 2008

W. Scandale, F. Zimmermann, HHH 1st Quarterly Status Report 2008, CARE Steering and Dissemination Board Meeting, LPNHE, Paris, 19 April 2008

Y.-P. Sun, LHC Luminosity Upgrade using Crab Cavities, ICFA mini-workshop on Deflecting/Crabbing Cavities, Shanghai 23-25 April 2008

F. Zimmermann, Summary of LHC-CC08 and LHC Crab Effort, PAF Mtg 14.04.2008 F. Zimmermann, I. Santiago Gonzalez, Longitudinal Stability of Flat Bunches with

Space-charge or Inductive Impedance,EPAC'08 Genoa, CARE-Conf-08-005-HHH R. Calaga, Y. Sun, R. Tomas, F. Zimmermann, Crab Compensation for LHC Beams,

EPAC'08 Genoa, CARE-Conf-08-006-HHH M. Giovannozzi, F. Borgnolutti, O. S. Brüning, U. Dorda, S. D. Fartoukh, W. Herr,

M. Meddahi, E. Todesco, R. Tomas, F. Zimmermann, R. de Maria, Analysis of Optical Layouts for the Phase 1 Upgrade of the CERN Large Hadron Collider Insertion Regions, EPAC'08 Genoa, CARE-Conf-08-007-HHH

R. Garoby, Upgrade Issues for the CERN Accelerator Complex, EPAC'08 Genoa, CARE-Conf-08-008-HHH

Name Event Date31

CERN

HHHHHHHHHHHH

E. Laface, W. Scandale, S. Hasan, C. Santoni, Crystals Application in the TOTEM Experiment to Increase the Acceptance of a Roman Pot, EPAC'08 Genoa, CARE-Conf-08-009-HHH

E. Laface, W. Scandale, E. Y. Wildner, C. Santoni, Investigations on a Q0 Doublet Optics for the LHC Luminosity Upgrade, EPAC'08 Genoa, CARE-Conf-08-010-HHH

J.-P. Koutchouk, G. Sterbini, K. Ohmi, Increasing the Integrated Luminosity of SLHC by Levelling via the Crossing Angle, EPAC'08 Genoa, CARE-Conf-08-011-HHH

Y-P. Sun, R. Tomas, F. Zimmermann, Crab-Cavity Beam Dynamics Issues for an LHC Upgrade, July 2008, CARE-Note-2008-005-HHH

F. Caspers, G. Rumolo, W. Scandale, F. Zimmermann, Beam-Induced Multipactoring and Electron-Cloud Effects in Particle Accelerators, International Workshop in Multipactor, Corona and Passive Intermodulation (MULCOPIM'08), Valencia 24-26 September 2008, CARE-Conf-08-012-HHH

F. Zimmermann, Overview of LHC Machine Upgrade Plans from an LHCb Perspective, LHCb Upgrade Meeting, CERN, 5 August 2008

W. Scandale, A. Tarantin, Simulation of "Crystal", The Bent Crystal Based Collimation Experiment in the SPS, CERN/AT 2008-21, CARE-Note-2008-XXX-HHH


recent publications & presentations, 2008 cont’d

Name Event Date32

CERN

HHHHHHHHHHHH Proceedings of joint HHH mini-workshop on LHC Crab Cavities, CERN, 21.08. ‘08,

authors R. Calaga, E. Ciapala, R. Garoby, T. Linnecar, R. Tomas, F. Zimmermann Proceedings of joint HHH/LARP/BNL workshop on LHC Crab Cavities, LHC-CC08,

BNL, U.S.A., 25-26 February 2008, authors I. Ben-Zvi, R. Calaga, F. Zimmermann Proceedings CARE-Conf-08-002-HHH

Proceedings of CARE-HHH-ABI annual workshop on Schottky, Tune and Chromaticity Diagnostics (with Real-Time Feedback), Chamonix, France, 11-13 December 2007, edited by K. Wittenburg, Proceedings CARE-Conf-08-003-HHH

Proceedings of CARE-HHH-APD Workshop on Interaction Regions for the LHC Upgrade, DAFNE and SuperB (IR'07), INFN Frascati, Italy, 7-9 November 2007, edited by W. Scandale and F. Zimmermann, CERN-2008-006, CARE-Conf-08-001-HHH

Proceedings of CARE-HHH-APD Workshop on LHC Injectors Upgrade and LHC Beam Parameters Upgrade including Francesco Ruggiero Memorial Symposium and CERN-GSI Meeting (BEAM'07), CERN, Geneva, Switzerland, 1-5 October 2007 , edited by W. Scandale and F. Zimmermann, CERN-2008-005, CARE-Conf-08-004-HHH

Proceedings of CARE-HHH-AMT Workshop WAMSDO, CERN, 19-23 May 2008, edited by E. Todesco

HHH, CARE Meeting, CERN, 17.09. 2008

recent CARE-HHH workshop proceedings, 2008

Name Event Date33

CERN

HHHHHHHHHHHH


APD exchanges• 3-week visit by Mauro Pivi (SLAC) to CERN

for electron-cloud studies in March 2008, mostly supported by HHH:

• completion and benchmarking a novel simulation code "CMAD" for the detailed modeling of electron-cloud effects in LHC &SPS against simulations by the simpler code "HEADTAIL" considering a toy model

• setting up of serial and parallel CMAD electron-cloud computations for the actual MAD optics of both LHC and SPS on the CERN linux cluster

• discussions on possible electron-cloud countermeasures for the SPS upgrade, including the pertinent R&D program undertaken at PEP-II and CESR-TA

Name Event Date34

CERN

HHHHHHHHHHHH


APD exchanges cont’d

• 4-week visit by Kazuhito Ohmi (KEK) to CERN for crab-cavity & beam-beam & nonlinear optics studies in August 2008, mostly supported by HHH:

• strong-strong and weak-strong beam-beam simulations for LHC upgrade scenarios

• LHC crab-cavity noise tolerances from simulations• KEKB crab-cavity experience & simulations• various applications of crab-waist sextupoles to the

LHC upgrade (factor 3 luminosity gain for ultra-low beta* , possible use for mitigating long-range beam-beam effects, or collimation)

Name Event Date35

CERN

HHHHHHHHHHHH“crab-waist” collisions at DAFNE (note: no crab cavities but sextupoles!)

luminosity

current product

w/o crab waist

with crab waist

can we make use of crab waistsat the LHC?

C. Milardi

New!

Name Event Date36

CERN

HHHHHHHHHHHHcrab waist in LHC?

one example:

f=3.5 in LPA option by squeezed to sx/f=2.1cm (extreme!)

→ L increases (14/2.1)1/2=2.6 times→ xy decreases and xx is small for LPA

→ “crab waist has a chance to work!”

K. OhmiCARE-HHHmini-workshop28 August ‘08

New!

Name Event Date37

CERN

HHHHHHHHHHHH crab-waist collisions


K. Ohmi

New!

Name Event Date38

CERN

HHHHHHHHHHHH“crab-waist” to push beam halo away from opposing beam


K. Ohmi

New!

Name Event Date39

CERN

HHHHHHHHHHHH


APD exchanges cont’d - 2

• 1-week visit by Ulrich Dorda (Vienna) to CERN for participation in long-range beam-beam compensation experiments at the SPS & and HHH topical workshop in August 2008, supported by HHH:

• tune sensitivity of compensation • lifetime vs. distance power laws & WP dependence• “threshold” for collisions at reduced distance• simulations of long-range beam-beam experiments• “RF compensator”

Name Event Date40

CERN

HHHHHHHHHHHH



• 4-week visit by Rama Calaga (BNL) to CERN for advancing crab-cavity design in October 2008, partially supported by HHH

• 4-week visit by A. Tarantin (Dubna) to CERN for modeling the SPS crystal experiments in summer 2008, partially supported by HHH

• short-term visits by Erik Vallazza (INFN Trieste) and Michela Prest (U. Insubria) for participation in SPS H8RD22 crystal experiments

Name Event Date41

CERN

HHHHHHHHHHHH


• 1-week visits by M. Wilson (UK) and M. Jewell (Florida) for participation in WAMSDO workshop, partially supported by HHH

AMT exchanges


• planned 4-week visit by Chandra Bhat (FNAL) to CERN for developing a scheme to generate long, flat, intense “LPA” bunches in the upgraded injector complex

Name Event Date42

CERN

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2007 crystal experiments Seven weeks of CERN H8-SPS runs

goals: test multi-strip crystals, check the effect on electron and positrons,

dry-run for the equipment to be installed in the SPS Participation in crystal collimation experiment at

FNALProposal of 2008 test in the CERN-SPS ring Support: CARE-HHH , INTAS-CERN, INFN-NTA, Russian Foundation for Basic Research, CERN AB and AT Departments, FNAL

Name Event Date43

CERN

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2008 crystal experimentscrystal deflection of negative pions and muons inthe SPS NorthArea

W. Scandale et al

future experiment in SPS ring proper approved by Research Board

New!

Name Event Date44

CERN

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Channeling 2008international workshop on Charged and Neutral Particles Channeling Phenomena, October 25 - November 1, 2008 Erice (Trapani - Sicily), Italy , organized by INFN-LNF in cooperation with HADRON PHYSICS I3 , CARE HHH , and LPI RAS

http://www.lnf.infn.it/conference/channeling2008

coherent scattering of relativistic charged particles in matter radiation of relativistic charged particles in periodic structures

(coherent bremsstrahlung, channeling radiation, resonant transition radiation, diffraction radiation, parametric x-ray radiation, LPM effect)

crystal channeling, volume capture and crystal reflection of positive ions: theory and experiments; crystal assisted collimation in hadron colliders: proposals and experimental observations

channeling of radiations in capillary systems (micro- and nano-channeling, nanotubes, nanoporous)

novel types of sources for electromagnetic radiation (FEL, Thomson scattering, laser plasma acceleration)

applications of channeling phenomena (bending of the beams, positron sources, powerful radiation sources, x-ray waveguides, capillary/polycapillary optics, novel x-ray table-top instruments)

topics:

http://hadronphysics.infn.it/

http://esgard.lal.in2p3.fr/Project/Activities/Current/

http://www.lebedev.ru/

Name Event Date45

CERN

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2008 gantt chart - 1

Name Event Date46

CERN

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2008 gantt chart - 2

Name Event Date47

CERN

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2008 HHH highlights

crystal collimation update(results from 2008 SPS+FNAL experiments+ newly approved experiment in SPS proper)[W. Scandale or collaborator]

LHC crab cavities [R. Calaga or J. Tuckmantel or Frank Z.,…]

Name Event Date48

CERN

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Conclusions – HHH2008• numerous high-impact workshops concluding 5 years of

HHH activity, preparation of summary report• in 2008 so far 12 CARE-Conf docs + 2 CARE Notes

several more in the pipeline

• maintain focused efforts in many frontier areas- crystal collimation, slim magnets, e-cloud suppression, LHC crab cavities, beam-beam compensation, novel optics design schemes, fast cycling s.c. magnets, new beam diagnostics

• results benefit global accelerator community- code repository, s.c. database, intensity limits

• sustained strong dissemination & training effort- mutual visits between partner labs, publications, seminars, web pages, many summer students and graduate students

h igh energy h igh intensity h adron beams

Documents

accelerators hhh

cern support

care meeting

accelerator physics

hhh workshopscontributions

hhh fellow

topical hhh workshops

lhc experiments