Dayle Kotturi System Concept Review/Preliminary Design Review [email protected] November 16,...
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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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
Private ethernet8 kBytes at 120 Hz
PAD
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 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
VME Crate for longitudinal,
beam-based feedback
Dayle Kotturi
System Concept Review/Preliminary Design Review [email protected]
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
VME Crate for longitudinal,
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
System Concept Review/Preliminary Design Review [email protected]
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
VME Crate for longitudinal,
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
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
System Concept Review/Preliminary Design Review [email protected]
November 16, 2005
Supplementary Slides…
…on next page to end
Dayle Kotturi
System Concept Review/Preliminary Design Review [email protected]
November 16, 2005
476 MHz master amplifier
PEP-II master phase shifter
Dayle Kotturi
System Concept Review/Preliminary Design Review [email protected]
November 16, 2005
2830.5 to 2856MHz Divide by 16 Chassis
LLRF Phase Reference System
Dayle Kotturi
System Concept Review/Preliminary Design Review [email protected]
November 16, 2005
119 to 476MHz Divide by 16 Chassis
LLRF Phase Reference System