dayle kotturi system concept review/preliminary design review [email protected] november 16,...

Dayle Kotturi

System Concept Review/Preliminary Design Review [email protected]

November 16, 2005

LLRF

Outline System Concept Review

Requirements Personnel Engineering requirements Interfaces Alternatives Test plan

Preliminary Design Review Block diagram Quality control and reliability Safety hazards

Dayle Kotturi


November 16, 2005

RequirementsAt 120 Hz, meet phase/amp noise levels defined as:

0.1% rms amplitude 100 fs rms in S-band (fill time = 850 ns) 125 fs rms in X-band (fill time = 100 ns)All tolerances are rms levels and the voltage and phase tolerances per klystron for L2 and L3 are Nk larger, assuming uncorrelated errors, where Nk is the number of klystrons per linac (L2 has 28; L3 has 48)

Dayle Kotturi


November 16, 2005

Personnel

Customers = Patrick Krejcik + Paul Emma need LLRF control system thru L1S by Dec 06

Hardware = Ron Akre, Jeff Olsen, Michael Cecere

Software = Dayle Kotturi, Arturo Alarcon

Dayle Kotturi


November 16, 2005

Engineering RequirementsWhen beam is present, control will be done by beam-based longitudinal feedback (except for T-cavs); when beam is absent, control will be done by local phase and amplitude controller (PAC)

Adhere to LCLS Controls Group standards: RTEMS, EPICS, Channel Access protocol

Ref: Why RTEMS? Study of open source real-time OS

Begin RF processing of high-powered structures May 20, 2006

Dayle Kotturi


November 16, 2005

InterfacesLLRF to LCLS global control system

PVs available for edm screens, archiving, etc over controls network

LLRF VME to beam-based longitudinal feedback from feedback: phase and amplitude corrections at 120 Hz over private ethernet from LLRF: phase and amplitude values

(internal) LLRF VME to LLRF microcontrollers from VME: triggers, corrected phase and amplitude from microcontrollers: phase and amplitude averaged values at 120 Hz, raw phase and amplitude values for debug

Dayle Kotturi


November 16, 2005

AlternativesThrough end of January 2005, various solutions were evaluated, from 100% COTS modules to hybrids of in-house designed boards. By May 2005, the options were narrowed down to two: an Off-the-shelf solution and an in-house solution. By August 2005, the in-house solution was selected

Dayle Kotturi


November 16, 2005

Test Plan

Will be described for the 5 categories of hardware

Low level RF chassis (in-house)

Monitor chassis (in-house with COTS timing)

Fast control chassis (in-house with COTS timing)

Slow control chassis (in-house)

Feedback control chassis (COTS products)

Dayle Kotturi


November 16, 2005

Test Plan for Low level RF chassis(in-house)

What for? Low level RF distribution where EPICS is not requiredWhere? LINAC Sector 0, the RF hut and klystron stationsStatus now: 119, 476, 2856, 2830.5 MHz – 16 way distributions complete. 476 MHz master amplifier completeSteps to complete:

by Nov2005: PEP-II master phase shifter install and testby Dec2005: IQPAU installation and testby Jan2006: LO chassis installation and test

Dayle Kotturi


November 16, 2005

RF DistributionM ain D rive L ine (M D L )4 7 6 M Hz R F3 6 0 Hz F id uc ia lF ro m S e c to r 0 (2 km )

RF HUT Coupler476MHz Ref.

M D L to L inac S e c to rs 2 1 to 3 0P E P and R e s e arc h Yard

LCLS Sector 20 RF Reference System

T IM IN G R F

1 1 9 M Hz 4 7 6 M HzO UT

T rac k/Ho ld1 2 0 Hz

T IM ING S YS T E MF ID O

L C L S M a s te r O s c .4 7 6 M Hz P L L4 7 6 M Hz w ith

3 6 0 Hz F id uc ia l

TR IG G E R S3 0 pS rms J itte r 1 1 9 M Hz

O UT

476MHz to 2856MHzMULTIPLIER

2856MHz2Watt Amplifier

2856MHz16 Way Distribution20dBm each

119MHz2W Amplifier

G unL 0 AL 0 BL 0 T C A VL 1 SL 1 XL IN A CE X P E R IM E N T S

1 1 9 M HzD ig itize r C lo c ks1 6 W ay D is trib utio n2 0 d B m e ac h

G unL 0 AL 0 BL 0 T C A VL 1 SL 1 X

2 8 3 0 .5 M H z L O1 6 W ay D is trib utio n2 0 d B m e ac h

2830.5MHz LO Gen2856MHz in119MHz in 2830.5MHz out

G unL 0 AL 0 BL 0 T C A VL 1 SL 1 X

2830.5MHz2Watt Amplifier

RF MONITOR

RF MONITOR

RF CONTROL

RF CONTROL

RF CONTROL

RF CONTROL

RF CONTROL

RF CONTROL

RF MONITOR

Phase Control

Phase Control

476MHz LO16 Way Distribution20dBm each

476MHz2Watt Amplifier

Phase Control

2 8 5 6 M HzL A S E R L O C KR e fe re nc e

Phase Control

P has e C o ntro l

Power Monitor

Power Monitor

1 1 9 M HzM o nito r

Power Monitor

PowerMonitor

L A S E R D io d eP has e No is eM e as ure m e nt

CHASSIS Needed to be Built

L A S E R D io d eO utp ut

L O P has e M o nito r

PhaseControl

Dayle Kotturi


November 16, 2005

Test plan for monitor chassis – “PAD” (in-house with COTS timing)

What for? Local RF phase/amplitude detection/monitoringWhere? Laser, gun, L0-A, L0-B, L1-SStatus now: Evaluating ADCsSteps to complete:

by Dec2005: evaluation of ADCs (1chan) by Mar2006: board prototype (2 or 4 chan, thermo) by May2006: final board. Test (incl temp. cycling) by Sep2006: chassis (15 dual channel) avail. Test. by Oct2006: injector installation and test

Dayle Kotturi


November 16, 2005

PAD – the monitor board

I

RF LO

Q

I&Q MODULATORS

1

2

3

4

4 X 16 bit ADC (LTC2208)

119MHz Clock

I

RF LO

Q

1

2

3

4

Chan. 2 I

Chan. 1 Q

Chan. 1 I

Chan. 2 Q

FIFO 4 X 1k words

WCLK

16bit DATA

16bit DATA

WCLK

WCLK

16bit DATA

16bit DATA

WCLK

RF CHAN 1

INPUT

RF CHAN 2

INPUT

Line Drivers

MONITORS

EXTERNAL

TRIGGER

120Hz

EXTERNAL

CLOCK

119MHz

CS/

CLK

16 bit

DATACONTROL /

Arcturus

uC5282

Microcontroller Module

with 10/100 Ethernet

ET

HE

RN

ET

LO INPUTCPLD

Dayle Kotturi


November 16, 2005

Test plan for fast control chassis (in-house with COTS timing)

What for? Local RF phase/amplitude control

Where? Laser, gun, L0-A, L0-B, L1-S

Status now: board design

Steps to complete: by Jan2006: board prototype

by Mar2006: final board

by Sep2006: chassis (6 single channel)

by end of 2006 downtime: injector install/test

Dayle Kotturi


November 16, 2005

PAC – the control boardSSSBChassis

Temperature MonitorForward Power 0-?VReflected Power 0-?VOver Temp 0 or 12V Power Supplie +12VPower Supply -12V

I

R F L O

Q

I&Q MODULATOR

1

2

3

4

MAX58752 X 16 bit DAC119MHz Clock(1MHz to 200MHz)

I

Q

AlteraCyclone EP1C3FPGA

16bit DATA

CS/CLK

16bit DATA

16 bitDATA

CLK

CLKCONTROL /ArcturusuC5282Microcontroller Modulewith 10/100 Ethernet

ET

HE

RN

ET

Control Control

RF OUTPUTTo SSSB

TRIGGERMonitor TTL

EXTERNALTRIGGER120Hz60nS NIM

2856MHz Ref

MONITORPORTS

AD8099 Diff Amp

SSSBTrigTTL17 to 30uS

Thermocouples

CLOCK119MHz

RF BOARD

t

MATCHINGFILTERNETWORK

TemperatureMonitor t

DC PowerSupplies

DC PowerSupplyMonitors

Control BoardADCs

TemperatureMonitor

Dayle Kotturi


November 16, 2005

Test plan for slow control chassis (in-house)

What for? Phase and amplitude control of the reference

Where? Sector 20 RF hut

Status now: not started

Steps to complete: between now and Feb 2006: determine if fast control module does the job. If yes, this is done. Otherwise:

by Feb2006: start design

by Mar2006: board prototype

by May2006: final board

by Sep2006: chassis (6 single channel)

by Nov2006: injector installation and test

Dayle Kotturi


November 16, 2005

RF crate What for? Local feedback control and timing for RF systemsWhere? Sector 20 RF hutStatus now: testing EVRSteps to complete:

evaluate number of signals and processor load to determine number of crates design and write software test with simulation and later hardware during 2006 downtime: installation and test

Dayle Kotturi


November 16, 2005

Feedback control crate (COTS products)

What for? beam-based longitudinal feedback

Where? At sector 20, in RF hut

Status now: software design

Steps to complete: purchase network switch module if IOC has insufficient ports

by Dec2006: software

by Dec2006: installation and test

Dayle Kotturi


November 16, 2005

Block Diagram 1: Laser - Tcav

I and Q Demo-dulator

CPU

FIFOs

DAC

slow

Temperature monitors

EVR

VME Crate at S20

CPU

Laser and RF ref

L0-AL0-B

L1-SL1-X

T Cav

gun

Controls gigabit ethernet (interface to MCC)

Eth recvr

Private ethernet8 kBytes at 120 HzPAD

ADC

FPGADAC

1 trigger for 4

channels of 1k

samples

Private ethernet4 kBytes at 120 Hz

In-house modules sharing VME crate for timing triggers

476 MH

z RF R

eferen

ce clo

ck dist

ributed

to all 3

0 sect

ors in

the Lin

ac and

beyon

d RF Reference/4 = 119 MHzstabilized to 50 fs jitter

RF Reference*6 = 2856 MHzstabilized to 50 fs jitter

Coldfire CPU

running RTEMS

and EPICS

Coldfire CPU

running RTEMS

and EPICS

Global longitudinal beam-based

feedback VME crate

PAC

RF Phase and Amplitude correction at 120 Hz for:laser, gun, L0-A, L0-B, L1-S, L1-X, T cav

10' accelerator

IQ Modulator gives phase

and amplitude control

1 kW 1 kW

Solid State Sub Booster

Klystron

SLED cavity

60 MW

HPRF240 MW

60 MW

1 kW

All except laser RF

100 mW

119 MHz Laser

Oscillator

Amps

GunNB: For the gun, SLED

cavity is shorted out

119 MHz120 Hz

UV

photodiode

photodiode

1 trigger to travel up to ½ sector

away

Beam-based longitudinal

fast feedback gigabit

ethernet

DAC

slow

VME Crate for longitudinal,

beam-based feedback

Dayle Kotturi


November 16, 2005

Block Diagram 2: L2-L3

I and Q Demo-dulator

CPU

FIFOs

DAC

slow

Thermocouple system

EVR

VME Crate at S24

CPU

Controls gigabit ethernet (interface to MCC)

Eth recvr


PAD

ADC

FPGADAC

1 trigger for 4

channels of 1k

samples


In-house modules sharing VME crate for timing triggers

476 MH

z RF R

eferen

ce clo

ck dis

tribute

d to all

30 se

ctors i

n the L

inac a

nd bey

ond

RF Reference/4 = 119 MHzstabilized to 50 fs jitter

RF Reference*6 = 2856 MHzstabilized to 50 fs jitter

Coldfire CPU

running RTEMS

and EPICS

Coldfire CPU

running RTEMS

and EPICS

L2: in sector 24, there are 3 stations to adjust in order to accurately control phase and amplitude for long, beam-based

fast feedback

PAC

Sector 25 T Cav (L24-8)

RF Phase and Amplitude correction at 120 Hz for:L2, S25 Tcav and L3

10' accelerator

IQ Modulator gives phase

and amplitude control

1 kW 1 kW

Solid State Sub Booster

Klystron

SLED cavity

60 MW

HPRF240 MW

60 MW

1 kW

100 mW

NB: For the gun, SLED cavity is shorted out

1 trigger to travel up to ½ sector

away

Beam-based longitudinal

fast feedback gigabit

ethernet.Setting only

L24-1

L24-3L24-2

S30

S29

DAC

slow


beam-based feedback

Dayle Kotturi


November 16, 2005

Block Diagram 3: Total Modules

Eth recvr

EVR

VME Crate at S20

CPU

CPU

PAC

Gun

PADPADPAD

PAC

RF Dist’n

Laser

PAC

L0-B

PADPAD

PAC

L1-S

PADPAD

PACL0-Tcav

PADPAD

PACL0-A

PADPAD

PACPAD

PAD PAC

Beam Phase Monitor

PAD

PACPACPAC

PACPAD


beam-based feedback

Total number of Fast PACs: 14Total number of Slow PACs: 6

Total number of PADs: 20Total number of VME crates: 3

Eth recvr

EVR

VME Crate at S24

CPU

PAC

L24-1

PACL24-2

PACL24-3

PACTcav L24-8

PACS29

PACS30

PADPAD

RF phase and amplitude correction and global feedback at 120 Hz for LCLS LINAC

PAC

L1-X

PADPADPAD

Dayle Kotturi


November 16, 2005

Eth recvr

EVR

VME Crate at S20

CPU

CPU

PAC

Gun

PADPADPAD

PAC

RF Dist’n

Laser

PAC

L0-B

PADPAD

PAC

L1-S

PADPAD

PACL0-Tcav

PADPAD

PACL0-A

PADPAD

PACPAD

PAD PAC

Beam Phase Monitor

PAD

December 2006 Commissioning Readiness

PACPACPAC

PACPAD


beam-based feedback

Total number of Fast PACs: 6Total number of Slow PACs: 6

Total number of PADs: 15Total number of VME crates: 2

Block Diagram 4: for December 2006

Dayle Kotturi


November 16, 2005

Quality control and reliability

Buy components from reliable vendors

Test each component and circuit board

Components will be tested in an incubator cycled from room temperature through 45 degC

Dayle Kotturi


November 16, 2005

Safety hazardsRF 1kW at 120Hz at 5uS = 0.6 Watts average, 2 Watt average amps at 2856MHz, 60W average amps at 476MHz

Hazards – RF Burns

Mitigation – Avoid contact with center conductor of energized connectors

110V AC ConnectorRequire “Electrical Safety 251” completion for plugging/unplugging

Hazards - Shock

Mitigation - Don’t touch conductors when plugging into outlet.

The LLRF system is less hazardous than a cell phone and equally hazardous as plugging in a 110V AC cord at home

Dayle Kotturi


November 16, 2005

Supplementary Slides…

…on next page to end

Dayle Kotturi


November 16, 2005

476 MHz master amplifier

PEP-II master phase shifter

Dayle Kotturi


November 16, 2005

2830.5 to 2856MHz Divide by 16 Chassis

LLRF Phase Reference System

Dayle Kotturi


November 16, 2005

119 to 476MHz Divide by 16 Chassis

LLRF Phase Reference System

dayle kotturi system concept review/preliminary design review [email protected] november 16,...

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