STATUS OF THE HLTC= HILUMI TECHNICAL COMMITTEE

Hermann Schmickler Frascati 16/11/2012

The HiLumi LHC Design Study (a sub-system of HL-LHC) is co-funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant

Agreement 284404.

Outline

Mandate of HLTC, Membership Future Functioning, Complementarity to HL-PLC Agenda of first meeting

- Technical documentation- Progress on BBLR Wire compensation- Outcome of e-lens mini Review

WBS: -what we are thinking now- resources: budget profiling, integration of collaborators

QAP: Documentation, Quality Plan Future Subjects (2013)…

Mandate… assess all the various technical systems proposed for the upgrade, their impact on machine performance, on machine availability and reliability and have technical solutions developed by the various expert teams.

… creation of a complete set of technical and managerial documentation for the project

…coordinate the efforts on remote handling of radioactive material

…follow up of technical work including collaborations

…assistance to the project leader by defining a resource plan, integrating it into the CERN standard tools. Prospecting together with the WP-leaders for new collaborators.

…reporting to HL steering committee

Membership Defined for first meetings, will be evolutive, “small” core

membership, additional invitations depending on agenda

affiliation/function name replacement

PL, TE-HDO Lucio RossiDPL, BE-ABP Oliver BrueningDH, BE Paul CollierDH, TE Freddy BordryDH, EN Roberto Saban

Chairman, BE-BI Hermann SchmicklerScientific secretary, DG-DG-OFF Isabel Bejar AlonsoMember, BE-RF Fritz Caspers Erk JensenMember BE-RF Rama Calaga Erk JensenMember BE-BI Rhodri Jones Thibaut LefevreMember BE-OP Mike Lamont Joerg WenningerMember BE-ABP Stephane FartoukhMember BE-ABP Stefano RedaelliMember BE-ABP Helmut BurkhardtMember TE-CRG Laurent Tavian Dimitri Delikaris

Member TE-VSC Vincent BaglinPaul Cruikshank, Jose Miguel Jimenez

Member TE-MSC Vittorio Parma Delio Duarte RamosMember TE-MSC Ezio Todesco Paolo FessiaMember TE-MSC Gijs de Rijk Luca BotturaMember TE-ABT Jan Uythoven Volker MertensMember EN-MME Francesco Bertinelli Diego PeriniMember DG-DI-DAT Sylvain Weisz

Expected future functioning

HiLumi Technical Committee: sounds awful Try to be low profile on administrative

overheads and procedures Nevertheless needs some rigeur on

documentation, implementation and resource planning

Partial overlap with agenda of HL-PLC wanted:we need counter-balance between specifications and technical possibilities

Two examples (= following slides) of what has been done so far:

BBLR wire compensation Organized within the CERN instrumentation group an

extended meeting in order to decide on preparatory cabling during LS1 (June 2012):- motivation, requirements, simulations- possible implementations during LS3- possibilities for test installations well before LS3- Conclusions: * obviously “yes” for preparatory cabling * some clarifying simulations (done) * Request for a detailed mechanical design of integrating of a double wire into a TCT collimator and acceptance by collimation team to use this assembly as operational collimator after LS1 (outstanding for 2013)

possible wire applicationsF. Zimmermann, O. Bruening

reduce crossing angle from e.g. 12 to 8 s → less luminosity loss + larger luminous region +

possibility of smaller b* keep crossing angle constant while

current is increased Closed Orbit and Tune correction keep crossing angle as small as possible

and level w. beta* to maximize luminous region

use as dynamic scraper

Simulations (T.L. Rijoff, F.Zimmermann)

Proposal (R.Steinhagen)

E-lens Suggestion of a mini-review at CERN before

Frascati meeting Fully organized by Stefano Redaelli http://

indico.cern.ch/conferenceDisplay.py?confId=213752

- Introduction and Motivation: S.Redaelli- Experience from Tevatron: G.Stancari- Simulations for the LHC and the SPS: V.Previtali- Feasibility of LHC and SPS installations: A.Rossi- Alternatives for Halo Cleaning: H.Schmickler

Observations/Questions Stefano will collect the opinions of reviewers and present a

summary to HLTC Convincing evidence of usefulness of such an installation from

Tevatron experience Additional Evidence from SPS experiments very questionable Exploit possibilities to make experiments at BNL with presently

installed e-lens (would require exchange of gun)

Scheduling of tests of alternative Halo cleaning in the LHC(tune modulation, tune selective high amplitude beam excitations)

Interest of machine protection team for e- lens in order to depopulate halo during stors (mitigation of crab cavity failures)

Sideproduct: Try to boost the activities for Halo Monitoring capabilities in the LHC: =10^6 dyn. Range Profile monitor, 2 D if possible

extended possibility for collaborations

Projects for Halo Monitoring (1)

1. The following slide is taken from Pavel Evtushenko et al. (JLAB); S&T review 2012- basic idea: light produced by the particle beam (wiggler, bend...) gets imaged in parallel onto 2 or 3 cameras with different gains. Recombination of the camera images into one high dynamic range picture.

in principle “easy”, (the devil is in the detail), but no assessment of spurious light (stray light, reflections)….similar problem in LHC

A.Fisher (SLAC) is working on other high dynamic range systems (masking out center of beam in BSRT);

already in contact with F.Roncarollo at CERN

Large Dynamic Range imaging

Intensity range that canbe measured now with no additional gain.

Intensity range whereadditional gain of ~ 100is needed

To be measured withimaging sensor #1and attenuation ~ 10

To be measured withimaging sensor #3and gain ~ 200

To be measured withimaging sensor #2and ~ no gain

10/15

Projects for Halo Monitoring(2)

The best way to cover a large dynamic range is by counting:

2. Photon Counting Techniques- experience at LHC with abort gap monitor (Avalanche Photodiode Detector: APD)- can imagine an APD array of 20 x 20 APDs pointing at a beam image of 10 x 10 sigma- measurement times for 10-6 dynamic range (a few seconds to 1 minute)- light source:

again the BSRT: expect again problems with stray lightor use luminescence monitor (probably with a small pressure

bump);Nitrogen luminescence delivers a narrow spectral line; light can be heavily filtered: almost no background

but: only gives projections (2 x 1D)

Great R&D project....

C. Fischer – LHC Instrumentation Review – 19-20/11/2001

Luminescence Profile Monitor

PRINCIPLE Uses the light emitted by gas molecules when they return to their ground state after having been excited by the beam:

Nitrogen is a good candidate: high cross-section,

low decay time, well pumped emits towards lower end of the visible spectrum

N 2 injection

To signalprocessing

CCD

I [MCP]

Beam

400 l/s 400 l/s

C. Fischer – LHC Instrumentation Review – 19-20/11/2001

Luminescence

At 7 10-5 Pa (5 10-7 torr), the photon production corresponds to the N2

+

spectrum: ~ 60% of the light is within the bandwidth of a 400nm ± 35nm filter.

0.00.10.20.30.40.50.60.70.80.91.0

300 400 500 600 700

Wavelength [nm]

Lig

ht

sig

na

l [a

rbit

rary

un

its

] 200 keV p

1.E+03

1.E+04

1.E+05

1.E+06

1.E-05 1.E-04 1.E-03

Nitrogen pressure [Pa]

PM

T c

ount

s [H

z]

Full spectrum

400 nm ± 35 nm

  

• The light production is linear with pressure: single step process with short decay time suitable for profile measurements.• The pressure can be used to increase the dynamic range of the detector. The pressure increase is negligible in the SPS: 5% for 6 10-5 Pa (5 10-7 torr) over 3 m

Signal as a function of N2 pressure

Spectrum

Maximising the Available Data - Example

17

APD

TDC

synchrotron light

LHC turn clock

Electrical pulse

Arrival time

filter

Longitudinal Bunch Shape

• LHC Longitudinal Density Monitor– Aims:

• Profile of the whole LHC ring with 50ps resolution• High dynamic range for ghost charge measurement

– Method:• Single photon counting with Synchrotron light

– Avalanche photodiode detector– 50ps resolution TDC

Trends in Particle Beam Diagnostics - Dr. Rhodri Jones (CERN)

Courtesy of A. Jeff

LDM Results

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• Results– Able to profile the whole ring within a matter of minutes– Critical input for accurate luminosity calibration of the experiments

Trends in Particle Beam Diagnostics - Dr. Rhodri Jones (CERN)

Technical and managerial documentation for the project; main actor: Isabel Bejar-Alonso;

has produced the 2 following slides

HL-LHC technical and managerial documentation shall be state of the art, but we do not have to forget that it shall integrate on the LHC documentation.

The LHC documentation followed the LHC QAP. Since 1997 Quality has evolved and the product approach has been replaced by a process approach. While the most part of the contents of the LHC QAP could still be applied with some updating, the information is split in several documents and does not cover all areas.

When the LHC QAP was created most research centers did not had their own Quality management system and industry was moving from quality control to quality management. Today we will have to consider the existing Quality management systems and find how to harmonize them.

Collaborations with outside partners and EU co-funding are strong constraints to get moving to up-to-date QAP.

Current approachThe collaborative nature of the HiLumi work packages and of the HL-LHC project requests also that the HL-LHC Quality management is collaborative.

The project will need to put in common all the Quality management documents so to identify equivalences and tools for harmonization

WP1Country Participant Participant Full Name Participation WPSwitzerland CERN European Organization for Nuclear Research Partner 1, 2, 3, 4, 5, 6US FNAL Fermi National Accelerator Laboratory (Fermilab) Associate 1, 2, 3, 4US LBNL Lawrence Berkeley National Laboratory Associate 1, 2, 3, 4US SLAC SLAC National Accelerator Laboratory Associate 1, 2, 4

WP2Country Participant Participant Full Name Participation WPFrance CEA Commissariat à l'Energie Atomique et aux Energies Alternatives Partner 2, 3, 4Germany DESY Deutsches Elektronen-Synchrotron Partner 2INFN INFN Istituto Nazionale di Fisica Nucleare Partner 2, 3, 6Japan KEK High Energy Accelerator Research Organization Partner 2, 3, 4Russia BINP Budker Institute of Nuclear Physics Partner 2Spain CSIC Consejo Superior de Investigaciones Cientificas Partner 2, 5Switzerland CERN European Organization for Nuclear Research Partner 1, 2, 3, 4, 5, 6Switzerland EPFL Ecole Polytechnique Fédérale de Lausanne Partner 2UK STFC Science & Technology Facilities Council Partner 2, 4UK UNILIV University of Liverpool Partner 2UK UNIMAN University of Manchester Partner 2, 5US BNL Brookhaven National Laboratory Associate 2, 3, 4US FNAL Fermi National Accelerator Laboratory (Fermilab) Associate 1, 2, 3, 4US LBNL Lawrence Berkeley National Laboratory Associate 1, 2, 3, 4US SLAC SLAC National Accelerator Laboratory Associate 1, 2, 4

Project Management and Technical Coordination

Accelerator Physics and Performance

A Draft quality manual has been prepared that will give high level guidance. The main work will be to establish the Quality procedures. A team with representatives from the collaboration should start working on:

•Documentation handling (including Document and Record Control Process)•Product identification and traceability•Management Review•Process options and deviation•Change Control Configuration•Issues and Problem Reporting

Two Options

The way to use tools and update the standards will change in function of the project management structure. A centralized structure with approval

committees and an strong project management structure (control on milestones, schedule, cost, formal reviews, …. ) could go to a system oriented structure (like the Hardware baseline). Coherence will be ensured by the project team and the committees.

A delegated structure with all task under the Work package will go versus a WPs oriented structure and coherence will be ensured by rules enforced by the tools and very large training.

Next agenda points

Somewhat between 6 and 12 meetings in 2013 Collect new subjects from TC members Following HLPLC subjects which are ready for

technical assessment In addition:

- WBS decisions and implementation,integration of collaborations?- 2013 budget proposals- mini workshop at CERN to collect needs and work done so far on remote handling- were appropriate: stimulate writing and reviewing of functional specifications

Great Quotes

A Committee is a group that keeps minutes and loses hoursMilton Berle

Committee – a group of people that individually do nothing, but collectively decide that nothing can be done.Fred Alen

Other Procedures (Extra slide)

Related to Project and Quality Quality Policy Management Review Procedure Logistics of componentsRelated to communication management Public Information Program Plan Crisis Communications Management PlanRelated to Product management Documentation handling procedure (including Document and Record Control

Process) Product identification and traceability Process options and deviation procedure. Engineering Change Request & Engineering Change Change Control Configuration Issues and Problem Reporting procedure Non-conformance Reporting and Resolution Process Product release method and verification process Test Equipment & Process Instrumentation Calibration Procedures