Transcript Linac Coherent Light Source (LCLS) Low Level RF System February 8, 2006

Linac Coherent Light Source (LCLS)
Low Level RF System
Injector Turn-on December 2006
February 8, 2006
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Safety First and Second and Third…..to Infinity
Hazards in the LLRF system
RF 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. All employees working with LLRF systems are
required to have the proper training.
110VAC Connector
Hazards - Shock
Mitigation - Don’t touch conductors when plugging into outlet.
All chassis are inspected by UL trained inspector.
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Scope of Work – Injector Turn-on
Linac Sector 0 RF Upgrade WBS 1.02.04.03.01
All 3 RF Chassis completed and Installed
Control Module to be installed Feb 06
Sector 20 RF distribution system WBS 1.02.04.03.02
Phase and Amplitude Controllers – 9 units
Phase and Amplitude Monitors – 2 dual channel units
Phased Locked Oscillator
LO Generator
52 Chassis Total
Multiplier – 476MHz to 2856MHz – 2 units
Amplifiers – 4 units
9 Chassis Completed
Laser Phase Measurement
LLRF Control and Monitor System WBS 1.02.04.03.03
1 kW Solid State S-Band Amplifiers – 5 units
Phase and Amplitude Monitors – 16 dual chan units
Phase and Amplitude Controllers – 6 single chan units
Bunch Length Monitor Interface
Beam Phase Cavity WBS 1.02.04.03.04
Will use single channel of RF Monitor Chassis
Pill box cavity with 2 probes and 4 tuners
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
LCLS Layout
P. Emma
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
LLRF Control system spans Sector 20 off axis injector to beyond Sector 30
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
LCLS RF Jitter Tolerance Budget
Lowest Noise Floor
Requirement
0.5deg X-Band = 125fS
Structure Fill time = 100nS
Noise floor = -111dBc/Hz
@ 11GHz 10MHz BW
-134dBc/Hz @ 476MHz
0.50
X-band
XRMS tolerance budget for
<12% rms peak-current jitter or
<0.1% rms final e− energy
jitter. 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.
P. Emma
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Slow Drift Tolerance Limits
(Top 4 rows for De/e < 5%, bottom 4 limited by feedback dynamic range)
Gun-Laser Timing
Bunch Charge
Gun RF Phase
Gun Relative Voltage
L0,1,X,2,3 RF Phase (approx.)
L0,1,X,2,3 RF Voltage (approx.)
(Tolerances are peak values, not rms)
2.4* deg-S
3.2
%
2.3 deg-S
0.6
%
5
deg-S
5
%
P. Emma, J, Wu
* for synchronization, this tolerance might be set to 1 ps (without arrival-time measurement)
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Linac Sector 0 RF Upgrade
LCLS must be compatible with the existing linac operation including PEP timing shifts
MAIN LINAC (SECTOR 0) RF/TIMING SYSTEM
Master Oscillator is
located 1.3 miles
from LCLS Injector
Measurements on
January 20, 2006
show 30fS rms jitter
in a bandwidth from
10Hz to 10MHz
1
476MHz
PEP PHASE
MASTER
OSCILLATOR SHIFTER
+-720 Degrees
in 0.5mS
LCLS LLRF
MASTER
AMPLIFIERS
476MHz
SLC COUNTDOW N
CHASSIS 476MHz
Divide to 8.5MHz
8.5MHz
360Hz Line
Sync.
360Hz
PEP PHASE SHIFT ON MAIN DRIVE LINE
February 8, 2006
Sum
Fiducial
to RF
Master Trigger
Generator MTG
Syncs Fiducial to
8.5MHz Damping Ring
and 360Hz Power Line
Main Drive Line (MDL)
476MHz RF plus
360Hz Fiducial
To:
Main Linac - 2 miles
Damping Rings
PEP
NLCTA
End Station A
FFTB
ORION
1.3 Miles to
LCLS Injector
Fiducial Generator
Syncronized to:
360Hz Power Line
8.5MHz Damping Ring
476MHz RF Distribution
MDL RF with TIMING Pulse – Sync to DR
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Linac Sector 0 RF Upgrade Status
New Low Noise Master Oscillator – Done
New Low Noise PEP Phase Shifter
RF Chassis – Done
Control Chassis – Feb 06
New Low Noise Master Amplifier – Done
Main Drive Line Coupler in Sector 21 – Done
Measurements
Noise floor on 476MHz of -156dBc/Hz
Integrated jitter from 10Hz to 10MHz of 30fS
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Sector 20 RF Distribution
Main Drive Line (MDL)
476MHz RF
360Hz Fiducial
From Sector 0 (2km)
LCLS Sector 20 RF Reference System
MDL to Linac Sectors 21 to 30
PEP and Research Yard
RF HUT Coupler
476MHz Ref. 100uW
FSJ4-50 0.8dB/30ft
476MHz
LASER LOCK
Reference
LCLS 476MHz PLL
RF CONTROL
IQ Modulator
TIMING SYSTEM
FIDO
120Hz
TRBR
Track/Hold
TRBR
RF CONTROL
Offset adjust
LASER
Sample and Hold PLL
with DAC offset adjust
and Error Monitor
LASER Diode
Output
2830.5MHz LO Gen
119MHz
0dBm OUT
4x 476MHz
13dBm OUT
+13dBm in
476MHz to 2856MHz
MULTIPLIER
+7dBm
476MHz to 2856MHz
MULTIPLIER
+7dBm
+17dBm
RF CONTROL
IQ Modulator
Phase Critical Cables
RF CONTROL
IQ Modulators
IQ Modulator to adjust
2830.5MHz to 2856MHz Phase
2856MHz
LASER Diode
Phase Noise
Measurement
2856MHz
25.5MHz out
102MHz out
RF CONTROL
IQ Modulator
IQ Modulator Control
Mixer Monitor
RF MONITOR
RF CONTROL
IQ Modulator
Divide 112 to 25.5MHz
SSB Mix to 2830.5MHz
4X to 102MHz
+13dBm in
+17dBm
2856MHz in
2830.5MHz out
RF CONTROL
IQ Modulator
2856MHz
2Watt Amplifier
102MHz
2Watt Amplifier
2830.5MHz
2Watt Amplifier
Diode Detector
Diode Detector
Diode Detector
LO Phase Monitor
RF MONITOR
Laser <140ft < 700fSpp
Gun < 100ft < 400fSpp
2856MHz
16 Way Distribution
20dBm each
Gun
L0A
L0B
L0TCAV
L1S
L1X
LINAC
EXPERIMENTS
102MHz
Digitizer Clocks
16 Way Distribution
20dBm each
2830.5MHz LO
16 Way Distribution
20dBm each
Gun
L0A
L0B
L0TCAV
L1S
L1X
Gun
L0A
L0B
L0TCAV
L1S
L1X
LO Phase Monitor
RF MONITOR
2856MHz from Sector 21
February 8, 2006
LCLS LLRF
LO Phase Monitor
RF MONITOR
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Sector 20 RF Distribution System Status
Phase Locked Oscillator – 476MHz
Preliminary Design – same as SPPS
Low Noise 119MHz VCO and Multipliers in house
Analog Track/Hold / feedback amp complete unit tested at SPPS
May consider digital feedback amp if time permits
LO Generator – 2830.5MHz
Preliminary Design complete – 80% of Parts are in house
PC Board in design
Multipliers - 476MHz to 2856MHz – Done
Phase and Amplitude Control Unit
In Design – Testing IQ modulators and amplifiers – See Next Section
Phase and Amplitude Monitor Unit
In Design – Testing Mixers, Amplifiers, Filters – See Next Section
Amplifiers – not ordered yet
Laser Phase Measurement System – Design Started
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
LLRF Control System
Distributed Control System
Microcontroller based IOC Control and
Monitor Modules
Central Feedback Computer
See LLRF Control talk
Control breakout session – Attached
By Dayle Kotturi
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
LLRF Control and Monitor System Status
1 kW Solid State S-Band Amplifiers – 5 units
1kW amplifier modules currently in test
Existing amplifier support design under review
Phase and Amplitude Monitors – 16 dual chan units
Preliminary Design Complete
Evaluating amplifiers, mixers, and filters
Phase and Amplitude Controllers – 6 single chan units
Preliminary design complete
Evaluating mixers and amplifiers
Bunch Length Monitor Interface
Need Specifications
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Beam Phase Cavity Status
Measurement of beam phase to RF reference phase. The result will be
used to correct timing of laser to RF reference. Cavity is located
between L0A and L0B.
Electronics will use single channel
of RF Monitor Chassis
Pill box cavity with 2 probes and 4
tuners
Cavity Electronics will use single
channel of RF Monitor
Cavity in design - probe and tuner
design complete
Fab, Test, Tune – May 2006
Bake – June 2006
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Status Summary
Linac New Low Noise Source – RF components installed, Controls Feb06
RF Distribution – Prototyping underway (R. Akre, B.Hong, H. Schwarz)
Monitor Controller Board (J. Gold, R. Akre, Till Straumann)
Single channel prototype for ADS5500 tested to specifications
Four channel ADS5500 board – layout complete (SNR 70dBFS)
Switched to LTC2208 16bit 130MSPS ADC (Prototype in test) (SNR 77dBFS)
RF Monitor Board in preliminary design (H. Schwarz, B.Hong)
Testing mixers
Control Boards (J. Olsen)
Fast Control Board – in test
Slow control board – May use fast board
RF Control Board in preliminary design (H. Schwarz, B. Hong)
Software (D. Kotturi, Till Straumann)
EPICS on RTEMS on Microcontroller done
Drivers
Algorithms
System Completion - December 2006 for Injector
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
End of LLRF RF Talk
Backup for RF Talk
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
MPS – PPS Issues
Addressed by Controls Group
Not Reviewed Here
Vacuum
New vacuum system summary to be fed to each
klystron existing MKSU.
PPS System
Injector modulators will be interlocked by Injector
PPS system.
PPS requirements for radiation from the injector
transverse accelerator needs to be determined.
Radiation levels will be measured during testing
in the Klystron Test Lab – Feb 06.
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Bandwidth of S-Band System
Upper Frequency Limit – 10MHz
Beam-RF interaction BW due to structure fill time
< 1.5MHz S-Band Accelerators and Gun
~10MHz X-Band and S-Band T Cav
Structure RF Bandwidth ~ 16MHz
5045 Klystron ~ 10MHz
Lower Frequency Limit – 10kHz
Fill time of SLED Cavity = 3.5uS about 100kHz
Laser – Needs to be measured ~ 10kHz
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Noise Levels
RF Reference Single Side Band (SSB) Noise Floor
2856MHz RF Distribution -144dBc/Hz
-174dBc/Hz @ 119MHz (24x = +28dB +2 for multiplier)
2830.5MHz Local Oscillator -138dBc/Hz
Integrated Noise
-138dBc/Hz at 10MHz = -65dBc = 32fS rms
SNR = 65dB for phase noise
Added noise from MIXER (LO noise same as RF)
SNR of 62dB
ADC noise levels
SNR of 70dB – 14bit ADS5500 at 102MSPS
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Phase Noise – Linac Sector 0
OLD MASTER OSCILLATOR
-133dBc/Hz at 476MHz
340fSrms jitter in 10MHz BW
NEW MASTER OSCILLATOR
-153dBc/Hz at 476 MHz
34fSrms jitter in 10MHz BW
Integrated Noise - Timing Jitter fs rms
Integral end
Integral start
Aug 17, 2004
Sector 30
Jan 20, 2006
Sector 21
February 8, 2006
LCLS LLRF
5MHz
1M
1k
10kHz
100
100k
10k
10
27
30
33
38
75
82
15
19
20
20
8
17
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Sector 20 RF Distribution Cable Errors
Temperature Coefficient of 2.8ppm/ºF and
Cable length is 1200ºS/ft
All Cables except LASER are less than 100ft
Distances feet and errors in degrees S total range
RF Hut
Down
Linac
Wall
Injector Total
Unit
Ft degS ft degS
ft degS
ft degS ft degS DegS
Laser 8 0.054 25 0.017 10 0.014 10 0.007 85 0.58
0.68
Gun
8 0.054 25 0.017 10 0.014 10 0.007 40 0.27
0.37
L0-A
8 0.054 25 0.017 10 0.014 10 0.007 30 0.21
0.31
B Phas 8 0.054 25 0.017 10 0.014 10 0.007 20 0.14
0.24
L0-B
8 0.054 25 0.017 10 0.014 10 0.007 20 0.14
0.24
L0-T
8 0.054 25 0.017 10 0.014 10 0.007 10 0.07
0.17
L1-S
8 0.054 25 0.017 50 0.068
0.14
L1-X
8 0.054 25 0.017 60 0.081
0.16
Temperature Variations: RF Hut ±1ºF : Penetration ±0.1ºF : Linac : ±0.2ºF
Shield Wall ±0.1ºF : Injector ±1ºF
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
RF Control and Monitor Signal Counts
Distribution (5~2850MHz, 4<500MHz)
9 IQ Mod 4 RF monitors
RF Gun
1 Klystron 7 RF monitors
Beam Phase Cavity
1 IQ mod 2 RF monitor
L0-A Accelerator
1 Klystron 4 RF monitors
L0-B Accelerator
1 Klystron 4 RF monitors
L0-T Transverse Accelerator
1 Klystron 4 RF monitors
L1-S Station 21-1 B, C, and D accelerators
1 Klystron 6 RF monitors
L1-X X-Band accelerator X-Band
2 IQ Mod 5 RF monitors
S25-Tcav
1 Klystron 4 RF monitors
S24-1, 2, & 3 Feedback
3 Klystrons
S29 and S30 Feedback
2 IQ modulators 476MHz
Total modulators and monitors
Totals at ~2856MHz
February 8, 2006
LCLS LLRF
23 modulators 40 monitors
15 modulators 33 monitors
Ron Akre, Dayle Kotturi
[email protected], [email protected]
LLRF Control and Monitor System
LLRF Control and Monitor System
1 kW Solid State S-Band Amplifiers – 5 units
Phase and Amplitude Monitors – 16 dual chan units
Phase and Amplitude Controllers – 6 single chan units
Bunch Length Monitor Interface – Need Specifications
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
RF Control
Required 11 Units
3
I Control
Includes Distribution
BXMP1007
I
1
RF In
17dBm
LO
RF 2
RF Out
17dBm
0dBm
Q
4
Q Control
2856MHz Input Monitor
2856MHz Output Monitor
2850MHz IQ Modulator
RF Control Module consist of the following:
Input Coupler, IQ Modulator, Amplifier, Output Coupler
Filters for I and Q inputs
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
RF Monitor
Required 16 Chassis for Injector – Includes Distribution
LO 2830.5MHz : RF 2856MHz
IF 25.5MHz (8.5MHz x 3 in sync with timing fiducial)
Double-Balanced Mixer
Mixer IF to Amp and then Low Pass Filter
Filter output to ADC sampling at 102MSPS
RF LO
2830.5MHz Local Osc.
Amplifier
IF
MIXER
2856MHz RF Signal
February 8, 2006
LCLS LLRF
To ADC
LTC2208 SNR = 77dBFS
25.5MHz BP FILTER
102MSPS
Ron Akre, Dayle Kotturi
[email protected], [email protected]
1 kW Solid State S-Band Amplifiers
Electrical Design Complete
– Under Review
Mechanical design in
progress
Modules in house – in test
Support parts – Some parts
in house
Power Supplies, relays,
chassis need to be
ordered
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
SLAC Linac RF – New Control
MDL 476MHz
Next Sector
1mW
1W
6X
2856MHz
Existing
Phase
Reference
Line
3
SubBooster
Sub Drive Line
The new control system will tie in
to the IPA Chassis with 1kW of
drive power available. Reference
will be from the existing phase
reference line or the injector new
RF reference
To Next
Klystron
I
3kW
1
Phase &
Amplitude
Detector
Klystron
SLED
200MW
February 8, 2006
LCLS LLRF
-45dB
Accelerator
1kW Amp
2856MHz
Q
4
IPA
High Power
Phase Shifter
Attenuator
20mW
Existing
System
LO
2 RF
IQ Modulator
I and Q will be controlled with a
16bit DAC running at 119MHz.
Waveforms to the DAC will be set
in an FPGA through a
microcontroller running EPICS on
RTEMS.
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Controls Talk
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
LLRF Controls
Outline
Requirements
External Interfaces
Schedule
Date Needed
Prototype Completion Date
Hardware Order Date
Installation
Test Period
Design
Design Maturity (what reviews have been had)
State of Wiring Information
State of Prototype
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Requirements
At 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)
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Engineering Requirements
When beam is present, control will be done by
beam-based longitudinal feedback (except for Tcavs); 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
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
External Interfaces
LLRF 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
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
External Interfaces: Laser - Tcav
RF Phase and Amplitude correction at 120 Hz for:
laser, gun, L0-A, L0-B, L1-S, L1-X, T cav
In-house modules sharing VME crate for timing triggers
476 MHz RF Reference clock distributed to all 30 sectors in the Linac and beyond
Temperature monitors
RF Reference/4 = 119 MHz
stabilized to 50 fs jitter
T Cav
L1-X
L1-S
L0-B
L0-A
gun
Laser and RF ref
PAD
I and Q
Demodulator
F
I
F
O
s
A
D
C
Coldfire
CPU
running
RTEMS
and
EPICS
D
A
C
s
l
o
w
C
P
U
RF Reference*6 = 2856 MHz
stabilized to 50 fs jitter
VME Crate at S20
running
longitudinal,
beam-based
feedback
E
V
R
PAC
Coldfire
CPU
running
RTEMS
and
EPICS
FPGA
Private ethernet
4 kBytes at 120 Hz
D
A
C
D
A
C
1 trigger
for 4
channels
of 1k
samples
s
l
o
w
Private ethernet
8 kBytes at 120 Hz
Private ethernet
Controls gigabit ethernet (interface to MCC)
IQ Modulator
gives phase
and amplitude
control
1 trigger to travel
up to ½ sector
away
All except laser RF
La
) I
&Q F
t (I r R
Ou ato
RF ler
or
e
rat
cc
ele
A
cc
c/
/A
Q)
na
ac
Li z (I& Q)
Lin
H (I&
20 z
F 1 MH
r R 19
se 1
La r RF
se
100 mW
119 MHz
Laser
Oscillator
Solid State Sub Booster
1 kW
photodiode
Amps
Klystron
119 MHz
120 Hz
60 MW
photodiode
UV
n
SLED
cavity
Gun
&
(I
NB: For the gun, SLED
cavity is shorted out
Q
)
HPRF
240 MW
1 kW
1 kW
60 MW
10' accelerator
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
External Interfaces: L2-L3
RF Phase and Amplitude correction at 120 Hz for:
laser, gun, L0-A, L0-B, L1-S, L1-X, T cav
In-house modules sharing VME crate for timing triggers
476 MHz RF Reference clock distributed to all 30 sectors in the Linac and beyond
Temperature monitors
RF Reference/4 = 119 MHz
stabilized to 50 fs jitter
T Cav
L1-X
L1-S
L0-B
L0-A
gun
Laser and RF ref
PAD
I and Q
Demodulator
F
I
F
O
s
A
D
C
Coldfire
CPU
running
RTEMS
and
EPICS
D
A
C
s
l
o
w
C
P
U
RF Reference*6 = 2856 MHz
stabilized to 50 fs jitter
VME Crate at S20
running
longitudinal,
beam-based
feedback
E
V
R
PAC
Coldfire
CPU
running
RTEMS
and
EPICS
FPGA
Private ethernet
4 kBytes at 120 Hz
D
A
C
D
A
C
1 trigger
for 4
channels
of 1k
samples
s
l
o
w
Private ethernet
8 kBytes at 120 Hz
Private ethernet
Controls gigabit ethernet (interface to MCC)
IQ Modulator
gives phase
and amplitude
control
1 trigger to travel
up to ½ sector
away
All except laser RF
La
) I
&Q F
t (I r R
Ou ato
RF ler
or
e
rat
cc
ele
A
cc
c/
/A
Q)
na
ac
Li z (I& Q)
Lin
H (I&
20 z
F 1 MH
r R 19
se 1
La r RF
se
100 mW
119 MHz
Laser
Oscillator
Solid State Sub Booster
1 kW
photodiode
Amps
Klystron
119 MHz
120 Hz
60 MW
photodiode
UV
n
SLED
cavity
Gun
&
(I
NB: For the gun, SLED
cavity is shorted out
Q
)
HPRF
240 MW
1 kW
1 kW
60 MW
10' accelerator
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Schedule – for PAD
Date Needed: injector: Dec/06
Prototype Completion Date:
Mar/06: board prototype (2 or 4 chan, thermo)
May/06: final board. Test (incl temp. cycling)
Hardware Order Date: continuous
Hardware Delivery Date:
by Sep/06: chassis (15 dual channel) avail.
Installation: injector: Oct/06
Test Period: injector: Nov/06
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Schedule – for PAC
Date Needed: injector: Dec/06
Prototype Completion Date:
Jan/06: first board prototype
Mar/06: first board prototype if not same as fast PAC
Hardware Order Date: continuous
Hardware Delivery Date:
by Sep/06: chassis (6 single channel)
Installation: injector: Nov/06
Test Period: injector: Nov/06
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Schedule – for slow PAC
Date Needed: injector: Dec/06
Prototype Completion Date:
Mar/06: first board prototype if different than fast
PAC
Hardware Order Date: continuous
Hardware Delivery Date:
by Sep/06: chassis (6 single channel)
Installation: injector: Nov/06
Test Period: injector: Nov/06
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Schedule – for timing/feedback crate
Date Needed: injector: Dec/06
Prototype Completion Date: Fall/06
Hardware Order Date: done
Hardware Delivery Date: have it
Installation: injector: Nov/06
Test Period: injector: Nov/06
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Design
Design maturity (what reviews have been had):
RF/Timing Design, DOE Review, August 11, 2004
Akre_FAC_Oct04_RF_Timing, FAC Review, October, 2004
Low Level RF Controls Design, LCLS Week, January 25-27, 2005
Low Level RF, Lehman Review, May 10-12, 2005
LLRF Plans for Development and Testing of Controls, LCLS Week, July 21, 2005
Low Level RF Design, Presentation for Controls Group, Sept. 13, 2005
LLRF Preliminary Design review, SLAC, September 26, 2005
LCLS LLRF Control System - Kotturi, LLRF Workshop, CERN, October 10-13, 2005
LCLS LLRF System - Hong, LLRF Workshop, CERN, October 10-13, 2005
LLRF and Beam-based Longitudinal Feedback Readiness - Kotturi/Akre, LCLS Week, SLAC, October 24-26,
2005
LCLS Week LLRF and feedback - Kotturi/Allison, LCLS Week, SLAC, October 24-26, 2005
LLRF, LCLS System Concept Review/Preliminary Design Review, SLAC, November 16-17, 2005 Comments
LLRF Beam Phase Cavity Preliminary Design review, SLAC, November 30, 2005
Docs at: http://www.slac.stanford.edu/grp/lcls/controls/global/subsystems/llrf
State of wiring: percent complete Captar input will be given at time of presentation
State of prototype: PAD (1 chan ADC) and PAC boards built (shown on next pages).Testing.
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
PAD – the monitor board
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
PAD – the monitor board
RF Board
Line Drivers
Filters
2 X 16 bit ADC
119 or 102MHz Clock
LTC2208
Transformer Coupled Inputs
Control Board
FIFO 2 X 1k words
16bit DATA
25.5MHz IF
16 bit
DATA
Chan. 1
IF
WCLK
RF LO
16bit DATA
CS/
CLK
MIXER
Chan. 2
IF
WCLK
RF CHAN 2
INPUT
CONTROL /
Arcturus uC5282
Microcontroller Module
with 10/100 Ethernet
RF LO
MIXER
Control
LO INPUT
RF - 25.5MHz
February 8, 2006
LCLS LLRF
EXTERNAL
CLOCK
102MHz
CPLD
EXTERNAL
TRIGGER
120Hz
Ron Akre, Dayle Kotturi
[email protected], [email protected]
ETHERNET
RF CHAN 1
INPUT
PAC – the control board
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
PAC – the control board
EXTERNAL
TRIGGER
TRIGGER
Monitor TTL 120Hz
60nS NIM
CLOCK
119MHz
SSSB
Chassis
MONITOR
PORTS
RF BOARD
MATCHING
FILTER
NETWORK
I&Q MODULATOR
3
16bit DATA
1
LO
2 RF
4
Q
XILINX
SPARTAN 3
FPGA
16 bit
DATA
CS/
CLK
CONTROL /
Arcturus uC5282
Microcontroller Module
with 10/100 Ethernet
AD8099 Diff Amp
2856MHz Ref
Control
Temperature
Monitor
DC Power
Supply
Monitors
t
Control
Temperature
Monitor
t
Thermocouples
DC Power
Supplies
February 8, 2006
LCLS LLRF
ADCs
Control Board
Ron Akre, Dayle Kotturi
[email protected], [email protected]
ETHERNET
I
CLK
MAX5875
2 X 16 bit DAC
119MHz Clock
16bit DATA
(1MHz to 200MHz)
Q
CLK
I
RF OUTPUT
To SSSB
Temperature Monitor
Forward Power 0-?V
Reflected Power 0-?V
Over Temp 0 or 12V
Power Supplie +12V
Power Supply -12V
SSSB
Trig
TTL
17 to 30uS
Additional Slides
The following two pages show an overview
of the LLRF control modules. From these
diagrams, counts of module types, as well as
function and location are seen.
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Overview of LLRF at Sector 20
RF phase and amplitude correction and global feedback at 120 Hz for LCLS LINAC S20
RF Dist’n
Laser
Gun
L0-A
L0-B
PAC
PAD
PAD
Key:
Indicates located in RF Hut
Otherwise at Klystron
SPAC
SPAC
SPAC
SPAC
SPAC
PAD
PAC
SPAC
PAD
PAC
PAD
PAD
PAD
PAD
Indicates may be needed
The maybe is included in
counts below
PAC
PAD
PAD
L0-Tcav
Eth
recvr
PAC
PAD
PAD
PAC
PAD
PAD
PAD
L1-S
PAC
PAD
Beam Phase
Monitor
C
P
U
E
V
R
VME Crate at S20
running
longitudinal,
beam-based
feedback.
L1-X
PAC
PAD
PAD
PAD
S20
Fast PACs:
Slow PACs (SPACs):
PADs:
VME crates:
February 8, 2006
LCLS LLRF
8
6
19
1
Ron Akre, Dayle Kotturi
[email protected], [email protected]
Overview of LLRF at Sector 24
RF phase and amplitude correction and global feedback at 120 Hz for LCLS LINAC S20
S24
L24-1
PAC
Fast PACs:
Slow PACs (SPACs):
PADs:
VME crates:
4
2
2
1
L24-2
PAC
L24-3
PAC
Tcav L24-8
PAC
PAD
PAD
Eth
recvr
C
P
U
E
V
R
VME Crate at S24
running
longitudinal,
beam-based
feedback.
S29
SPAC
S30
SPAC
February 8, 2006
LCLS LLRF
Ron Akre, Dayle Kotturi
[email protected], [email protected]