RF Control for the DESY UV-FELcasa.jlab.org/seminars/2004/slides/simrock_040206.pdf• Set and...
Transcript of RF Control for the DESY UV-FELcasa.jlab.org/seminars/2004/slides/simrock_040206.pdf• Set and...
CASA Seminar 2/6/04 Stefan Simrock DESY
RF Control for the DESY UV-FEL
Stefan Simrock
DESY
CASA Seminar 2/6/04 Stefan Simrock DESY
• DESY UV-FEL
• Configuration of the RF Systems
• Requirements for RF Control
• Design of the LLRF
• Issues for the European X-FEL
• Outlook
21 Jan. 2004 J. Rossbach: TTF2 Status Report 3
Status of beamline installations
250 m
RF gun
FEL experimenta
l area
bypass
undulators
collimatorbunch compressorLaser
M1 M2 M3 M4 M5 M6 M7
bunch compressor
1000 MeV4 MeV 150 MeV 450 MeV
CASA Seminar 2/6/04 Stefan Simrock DESY
General LLRF Requirements
• Set and maintain accelerating fields during TTF II operation as
• UV FEL user facility • Tesla Test Facility
• Cavities to be controlled: • RF Gun (nc) • 3rd harmonic cavity (3.9 GHz) • Vector-sum of cryomodule 1 • Vector-sum of cryomodules 2+3 • Vector-sum of cryomodules 4,5,6,(7) • S-Band cavity (nc) at 2.856 GHz • Provide stable phase reference for Laser, and diagnostics
21 Jan. 2004 J. Rossbach: TTF2 Status Report 4
Electron gun for minimum emittance: PITZ
PITZ gun installed into TTF Jan 2004
TTF2 RF GUNAT PITZ
Jean-Paul Carneiro Behavior of the TTF2 RF with long pulses and high repetition rates.
21 Jan. 2004 J. Rossbach: TTF2 Status Report 5
TTF 2 Laser Upgrade
diode-pumpedNd:YLF preamplifier
Pulse shaper(T = 5%)
Diode-pumpedNd:YLF oscillator
Emicro = 16µJP = 16 W
AOM
fround trip= 27 MHz
EOMAOM
Faraday
pulsepicker
pulsepicker
2-stage flashlamp-pumpedNd:YLF booster amplifier
fastcurrentcontrol
shot-to-shotoptimizer
2-stage diode-pumpedNd:YLF amplifier
fastcurrentcontrol
fourthharm.
Emicro = 200µJP = 200 W
20 ps flat-top4 ps edges
Emicro = 30µJEburst = 24 mJUV (262 nm)
pum
p di
ode
pum
p di
ode
pum
p di
ode
pum
p di
ode
pum
p di
ode
pum
p di
ode
pum
p di
ode
pum
p di
ode
Pulse Stacker
Note:
longitudinal flat profile by pulse
stacker only
• Together with Max-Born-Institute, Berlin (I. Will et al.)
• Upgrade has been tested at PITZ
21 Jan. 2004 J. Rossbach: TTF2 Status Report 8
Transverse Emittance Measurement @ PITZ-
1.71.5
Frank Stephan TESLA meeting, Zeuthen, Jan. 2004 21
transverse profile ( D=1.2 mm )
FWHM � 21 ps; rise/fall time � 7 psmm 0.020.61σmm 0.020.55σ
y
x
��
��
Fine Tuning of Laser Parameters
( measured in UV )
CASA Seminar 2/6/04 Stefan Simrock DESY
General LLRF Requirements (Cont’d) • The LLRF System for the FEL user facility must be • Reliable • Operable • Reproducible • Maintainable • Well Understood • Meet (technical) performance goals
• The LLRF System for the TESLA Test facility must • demonstrate high gradient operation at 35 MV/m
- requires piezo tuners for Lorentz force compensation - requires operation close to klystron saturation - exception handling
• Demonstrate of operation with electronics installed in tun-nel
21 Jan. 2004 J. Rossbach: TTF2 Status Report 10
LLRF Requirements: Support by:
ELHEP GroupWarsaw University of Technology
Institute Electronic System
Team:About 20 people scientists, engineers and students (Ph.D. and M.Sc.)working at:Warsaw, CERN, DESY
CASA Seminar 2/6/04 Stefan Simrock DESY
Amplitude and Phase Stability
• Typically requirements are
• σA/A < 10-3 amplitude • σφ < 0.3 deg. for phase (fast fluctuations) • Must distinguish correlated and uncorrelated errors, intra-pulse, inter-pulse,
and long-term (thermal > minutes). Long term stability of better than 1 deg. is difficult to achieve.
• Other requirements • ACC1: cav. 1-4 at 12.5 MV/m, cav. 5-8 at 20 MV/m phase
of accelerating field -10.8 deg. • ACC39 at 14 MV/m at 183 deg. • S-Band cavity at 2856 MHz phase stability < 1 deg. • RF Gun operation without field probe. Rep. rate, pulse
length and power must be variable.
TTF2 linac
2nd bunch compressor (internally called BC3)
bypass
undulators
collimator
M1 M2 M3 M4 M5 M6 M7
Laser
RF-Gun
1st bunch compressor (internally called BC2)
bunch compressor (internally
called BC2)
250 m
21 Jan. 2004 J. Rossbach: TTF2 Status Report 30
Magnetic chicane forlongitudinal compression
21 Jan. 2004 J. Rossbach: TTF2 Status Report 33
Temporarybeamline forseeding
Beam dump
21 Jan. 2004 J. Rossbach: TTF2 Status Report 24
Longitudinal bunch shape measurements at TTF2• Streak camera
–FESCA 200 (Hamamatsu)• Transverse deflecting cavity
–S-band travelling wave cavity from SLAC• Coherent radiation
–Interferometer from RWTH Aachen• Electro-optical sampling
21 Jan. 2004 J. Rossbach: TTF2 Status Report 25
LOLA Shipment from SLAC to DESY• Vertically deflecting cavity for bunch length
measurements at TTF2
• Built in the late 60ies by G. Loew et al.
• SLAC contribution to TTF2
“Intra-Beam Streak Camera”
ee−−
σσzz
3.66 m3.66 mVV((tt)) σσyy
RFRF‘streak’‘streak’
SS--bandband
transverse RF deflectortransverse RF deflectorββcc
ββpp∆∆ψψyy
21 Jan. 2004 J. Rossbach: TTF2 Status Report 26
LOLA shipment
LOLA installed
21 Jan. 2004 J. Rossbach: TTF2 Status Report 29
Electro-optical sampling at TTF1
• Ti:Saphire laser (15 fs) and ZnTe crystal• Electron bunch can be scanned by varying the delay of the laser• Polarization of the laser changes depending on the amplitude of the
“beam fields“
Signal
21 Jan. 2004 J. Rossbach: TTF2 Status Report 35
Task Name
vacuum installationACC1 string assemblyACC1 tunnel installationcoupler conditioning (warm)cool downcoupler conditioning (cold)cavity conditioninggun commissioning (nighttime)gun commissioning with beaminjector commissioning incl. BC2tunnel closedbeam through ACC1final installationcommssioning entire machinebeam through bypass into dumpbeam through undulator into dumfirst lasing (30 nm)FEL saturation (30 nm)
4/21
9/11
9/27
12/10
2
1 11 21 1 11 21 1 11 21 1 11 21 1 11 21 1 11 21 1 11 21 1 11 21 1 11 21 1 11 21 1 11 21 1 11 21 1 11 21 1 11 21Jan '04 Feb '04 Mar '04 Apr '04 May '04 Jun '04 Jul '04 Aug '04 Sep '04 Oct '04 Nov '04 Dec '04 Jan '05 Feb '05
Major schedule for TTF2 installation and commissioningMore detailed schedule (400 items) to be presented in WG3 by M. Körfer
JLAB, Nov. 2001 Stefan Simrock DESY
Typical Parameters in a Pulsed Linac
time
flat-topfill
cavity phase
accelerating voltage
incident power
cavity detuning
beam pulse
ampl.
...
Beam Loading
Beam pulse pattern(micro and midi pulse structure)
JLAB, Nov. 2001 Stefan Simrock DESY
Sources of Perturbations
o Beam loading - Beam current fluctuations - Pulsed beam transients - Multipacting and field emission - Excitation of HOMs - Excitation of other passband modes - Wake fields
o Cavity drive signal - HV- Pulse flatness - HV PS ripple - Phase noise from master oscillator - Timing signal jitter - Mismatch in power distribution
o Cavity dynamics - cavity filling - settling time of field
o Cavity resonance frequency change - thermal effects (power dependent) - Microphonics - Lorentz force detuning
o Other - Response of feedback system - Interlock trips - Thermal drifts (electronics, power amplifiers, cables, power transmission system)
JLAB, Nov. 2001 Stefan Simrock DESY
Pulsed Operation at High Gradients
0 0.5 1 1.5 20
5
10
15
20
25Cavity Gradients (First Cryomodule)
time [ms]
Eacc [M
V/m
]
0 0.5 1 1.5 2
−150
−100
−50
0
50
100
150
Cavity Phases (First Cryomodule)
time [ms]
ph
ase
[d
eg
.]
+140deg./ms0 µs flattop -100deg./ms
900 µs flattop
-22.5 MV/m
Gradient (8 cavities)
short pulse
Phase (8 cavities)
JLAB, Nov. 2001 Stefan Simrock DESY
Measurement of Cavity Q L and Detuning
0 200 400 600 800 1000 1200 1400 1600 1800 200010
−2
10−1
100
101
102
time [us]
log(
E_a
cc )
field decay: ~ e-t/τ
τQL
π f⋅-----------=
slope:1τ---–
rel. error < 1%0 200 400 600 800 1000 1200 1400 1600 1800 2000
50
60
70
80
90
100
110
120
130
140
150
time [us]
phas
e [d
eg]
phase with respect to LO⇒ ∆ω = dϕ
dt------ 2π ∆f⋅=
slope:dϕdt------
rel. error < 2 Hz
Loaded Q Detuning
JLAB, Nov. 2001 Stefan Simrock DESY
Lorentz Force Detuning
0 500 1000 1500 2000−300
−200
−100
0
100
200
300
time [µs]
detu
ning
[Hz]
Lorentz Force Detuning of D39 in Chechia
fill: 500 µs
flat: 800 µs
15 MV/m20 MV/m25 MV/m30 MV/m
fillflat-top
decay
JLAB, Nov. 2001 Stefan Simrock DESY
Digital Control at the TTF
DAC
DAC
ReIm
Cavity 32......8x
Cavity 25
klystronvector
modulator masteroscillator
1.3 GHz Cavity 8......8x
Cavity 1
cryomodule 4
...cryomodule 1
. . . .
LO 1.3 GHz + 250 kHz
250 kHz
ADC
f = 1 MHzs
. . . . ...
vector-sumΣ( )ab
a -b
1 8( )ab
a -b
25( )ab
a -b
32( )ab
a -b
DSPsystemsetpoint
tablegaintable
feed
tableforward
++digital
low passfilter
ImRe ImRe ImRe
clock
LO
ADC
LO
ADC
LO
ADC
ImRe
power transmission line
1.3GHzfield probe
JLAB, Nov. 2001 Stefan Simrock DESY
240
270
300
330
0
Module 2
1
2
34 5
6
7
8
Beam Transient based Phase and Gradient Calibration
time
Eacc
Pinc
Ibeam
(open loop)
φcav
beam induced transient
cavity filling
field decay
beam induced transient
Re(Eacc)φbeam∆Vind I ∆t
rQ----
π f⋅ ⋅ ⋅⋅=
for ∆t << τcav :
JLAB, Nov. 2001 Stefan Simrock DESY
Single Bunch transient Detection
field probe (1300 MHz)
delay line
powerdivider
phaseshifter
combiner
60 dB
LO
I
Q
Magnitudeof transient
TransientVector Detector
Klystron
few ns
cavity
Principle of high resolution transient detector
−40 −20 0 20 40 600.24
0.245
0.25
0.255
0.26
0.265
0.27
0.275
0.28
0.285
0.29
time [nsec]
am
plit
ud
e [a
rb. u
nits
]
Amplitude
Single Bunch Transient ( ∆A/A=0.1%)
JLAB, Nov. 2001 Stefan Simrock DESY
Single Bunch transient Detection
field probe (1300 MHz)
delay line
powerdivider
phaseshifter
combiner
60 dB
LO
I
Q
Magnitudeof transient
TransientVector Detector
Klystron
few ns
cavity
Principle of high resolution transient detector
−40 −20 0 20 40 600.24
0.245
0.25
0.255
0.26
0.265
0.27
0.275
0.28
0.285
0.29
time [nsec]
am
plit
ud
e [a
rb. u
nits
]
Amplitude
Single Bunch Transient ( ∆A/A=0.1%)
CASA Seminar 2/6/04 Stefan Simrock DESY
LLRF for TTF II
• Digital Feedback • C67 based DSP board • 8 channel ADC boards • 8 channel DAC board • Gigalink interface between boards
• Downconverter based on AD 8343 • Master Oscillator and Frequency Distribution • New Frequencies 13.5 MHz and 2856 MHz
Zeuthen, Jan. 2004 Stefan Simrock DESY
C67 DSP board
Zeuthen, Jan. 2004 Stefan Simrock DESY
C67 DSP board
Zeuthen, Jan. 2004 Stefan Simrock DESY
Rack Layout and Cabling for TTF I
Zeuthen, Jan. 2004 Stefan Simrock DESY
Installation Status of LLRF for ACC 2-6
FB and FF Scheme
Daniel Kotthaus
No probe in the cavity
Vacc=Vfor+Vref
Feedback on Vfor (later
with Vacc ?) with variable
Gp and GI
Feedforward on Vfor
adaption of FF with Vref
Detectors for Gun Control● The same detectors for forward and reflected power
● Field control with IQ detectors (AD 8347)
● Measurement of Loaded Q and detuning with logarithmic amplitude and phase detector (AD 8302)
● Modern phase detector (HMC 439) for phase monitoring
● Detector diode for amplitude monitoring
Daniel Kotthaus
Performance of the IQ Detector
Daniel Kotthaus
Zeuthen, Jan. 2004 Stefan Simrock DESY
FPGA based RF Gun ControllerFPGA
JLAB, Nov. 2001 Stefan Simrock DESY
Performance at TTF (1)
200 400 600 800 1000 1200 1400 1600 18000
5
10
15
400 600 800 1000 120011
11.5
12
12.5
time [µs]
Zoomed Region
acce
lera
tin
g g
rad
ien
t [M
V/m
]
only feedback (gain = 70)
with feedback and feedforwardcompensation
beam
0 500 1300900 1700
300 500 1100
200 400 600 800 1000 1200 1400 1600 1800−15
−10
−5
0
5
Zoomed Region
with feedback and feedforwardcompensation
only feedback (gain = 70)
400 600 800 1000 1200−1
−0.5
0
0.5
1
beam
time [µs]0 500 1300900 1700
300 700 1100
acce
lera
tin
g p
ha
se[d
eg]
Amplitude Phase
JLAB, Nov. 2001 Stefan Simrock DESY
Adaptive Feedforward
time [µs] time [µs]
Step Step Response
0 200 400 600 800 1000 12000
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
measured
Closed LoopSystem
Vec
tor
Sum
Rea
l
0 200 400 600 800 1000 12000
200
400
600
800
1000
1200
calculated for alinear time-invariantSystem
∆E τ1( )
∆E τ2( )
…∆E τn( )
T11 T12 … T1n
T21 T22 … T2n
… … … …Tn1 Tn2 … Tnn
∆ ff 1
∆ ff n
…∆ ff n
=
Par
t (∆
E(t
) )
[ΜV
/m]
∆ff t( ) ∆ ff jΘ t t j–( ).j
∑=
Fee
d F
orw
ard
Rea
l Par
t (∆ ff(
t) )
[bits
]
JLAB, Nov. 2001 Stefan Simrock DESY
Reproducibility of Subsequent Pulses of Vector-Sum
800 850 90090.35
90.4
90.45
90.5
90.55
90.6
time [us]
acce
l. vo
ltage
[MV
]
10 consecutive rf pulses
peak-to-peak: ± 0.03 MV∆Vacc (rms) < 0.02 MV
800 850 900 950
24.3
24.35
24.4
24.45
24.5
time [us]ph
ase
[deg
]
10 consecutive rf pulses
peak-to-peak: ± 0.03 o
∆Φ(rms) < 0.02 o
Gradient Phase
JLAB, Nov. 2001 Stefan Simrock DESY
System Identification (1)
smoothed
Cavity-Field
Forward-Power
Beam-Current
smoothed&
derived
smoothed
Detuning during Pulse
Beam-Phase
Bandwidth
V˙ ω1 2⁄– ∆ω
∆ω ω1 2⁄–V Rω1 2⁄ I G I B+( )+=
V˙ ω1 2⁄– ∆ω
∆ω ω1 2⁄–V Rω1 2⁄ I G I B+( )+=
Differential Equation
JLAB, Nov. 2001 Stefan Simrock DESY
0 5 10 15 20 250
20
40
60
80
100
120
140
160
180
No of Measurement
beam
phas
e/° 40˚ 50˚ 50˚ 60˚ 70˚
System Identification (2)• force Pf to be zero at
end of pulse by sub-straction of df*Pr(complex)
• the whole shapechanges
PrPf
400 600 800 1000 1200 1400 1600 1800 2000−150
−100
−50
0
50
100
150
time/µs
∆ f/H
z, ∆
f/H
z2 , V2 /2
MV
2
1st Order ID on Cavity 7
∆ω(t)
Single Pulse DetuningMeasurement
Vacc
Beam phase of 4 cavities fordifferent phase of Vacc
Correct for directivity of couplers
JLAB, Nov. 2001 Stefan Simrock DESY
Piezo-Actuator:
Umax=150Vl = 39 mm
∆l≈ 4 to 5µm at 2K∆fmax, static≈ 500Hz
Active Compensation of Lorentz Force Detuning (1)
He-tank+ cavity
tuning mechanism
piezo
JLAB, Nov. 2001 Stefan Simrock DESY
Active Compensation of Lorentz Force Detuning (2)
−200
−100
0
100
200
300
400
detu
ning
[Hz]
0 500 1000 1500 2000time [µs]
fill time 900 µs constant gradient
without compensation
with compensation
“beam on”- time9-cell cavityoperated at23.5 MV/m
Lorentz forcecompensatedwith fastpiezoelectrictuner
26/01/2004Lutz Lilje DESY
RF signals at 35 MV/m
Blue: With piezo
Red: Without piezo
26/01/2004Lutz Lilje DESY
NEW: Frequency stabilization at 35 MV/m
Blue: With piezo
Red: Without piezo
Frequency detuning of ~1000 Hzcompensated with resonant excitation of a mechanical cavity resonance at 230 Hz.
NOTE: This is rather an demonstration of the capability of active tuning. Application in a real machine is probably difficult/impossible.
11th SRF Workshop, 2003 Stefan Simrock DESY
Integration of Piezo Tuner for TTF
11th SRF Workshop, 2003 Stefan Simrock DESY
Measurement of Mechanical Preload
Force sensor
Lifetime of piezo depends stronglyon mechanical preload. Optimumaround 1 kN/ cm^2.
Piezo 1Piezo 2
lifetime
preload
1 kN/cm^2
2
(cycles)
1015
1010
3
Characterization of the load cellCharacterization of the load cellA new insert was designed to host different load cells and the load generating device. Our goal is the characterization of the sensor at 4 K up to 2kN.
A load cell under test – from Burster
• The button on the cell is pushed by stainless steel rod, 20 mm diameter.
• The loading force is generated by a screwing device provided with washer springs at the top of the insert.
• The loading force is measured by a calibrated load cell placed in the cross junction, working at room temperature.
Some resultsSome resultsUp to now some 2kN load cells from Burster have been tested at 4K.
Now some points are clear:
•High offset and low reproducibility are the main critical problems
•Linear range reduces and reproducibility fails at cold => we’ll test cells with specific cryogenic features and higher RT range(10-15 kN)
The measured TF of two 8415 model and their beaviour vs time
T=300 K
y = 2.55E-05x - 3.89E-04R2 = 1.00E+00
y = 2.38E-05x + 3.59E-05R2 = 1.00E+00
-0.001
0.000
0.001
0.003
0.004
0.005
0 50 100 150 200Kg
V8415-6002 s/n:1850218415-6002 s/n:184992
T=4 K
y = 1.70E-05x + 1.32E-02R2 = 9.62E-01
y = 1.84E-05x + 1.22E-02R2 = 9.82E-01
0.0120
0.0133
0.0145
0.0158
0.0170
0 50 100 150 200Kg
V 8415-6002 s/n:1850218415-6002 s/n:184992
11th SRF Workshop, 2003 Stefan Simrock DESY
New facility transfer functionsNew facility transfer functions
-70
-60
-50
-40
-30
-20
-10
0 500 1000 1500 2000Hz
dB
Amplitude
The single copper cell system has been caractherized measuring the transfer function between the piezoelectric actuator voltageand the phase detuning of the cavity.
Closed loop tests seem possible up to 2 kHz.
-600
-500
-400
-300
-200
-100
0
0 500 1000 1500 2000Hz
Deg
Phase
11th SRF Workshop, 2003 Stefan Simrock DESY
Microphonics Control
~~~klystron
cavity
piezoactuator
LO
RF
Microphonics
Controller
C(s)
IF
P(s)
uc(s)yc(s)
yp(s)
up(s)
piezosensor
11th SRF Workshop, 2003 Stefan Simrock DESY
Controller Design
P(s)
C(s)
frequency [kHz]
|D(s)|
1 10
Choose open loopresponse D(s)
C s( ) D s( )P s( )-----------= ⇒
D(s) : stability criteria fulfilled high gain at low freq. fast roll-off at high freq.
11th SRF Workshop, 2003 Stefan Simrock DESY
Feedback Successfully Applied to QWR
• C6701 processor from TI on PCI board (M67) with 4 ADCs and DACs (200kHz sampling rate)
• Programmed state space equation for 20th order sys-tem:
• Latency only 20 µs for 20x20 matrix multiplication (C++) • Applied only notchfilter (672 Hz) and low pass (1kHz) to
control microphonics in QWR
xk 1+ Axk Buk+=yk 1+ Cxk 1+ Duk 1++=
MIT Optics & Quantum Electronics Group
Balanced Cross-CorrelatorOutput
(650-1450nm)
Ti:sa
Cr:fo
3mm Fused Silica
SFG
SFG
Rep.-RateControl
(1/496nm = 1/833nm+1/1225nm).
Δt
0V
MIT Optics & Quantum Electronics Group
Measuring the residual timing jitter
Output(650-1450nm)
JitterAnalysis
SFG
Ti:sa
Cr:fo
3mm Fused Silica
SFG
SFG
Rep.-RateControl
(1/496nm = 1/833nm+1/1225nm).
GD
-GD/2
MIT Optics & Quantum Electronics Group
Measuring the residual timing jitter
Output(650-1450nm)
JitterAnalysis
SFG
Ti:sa
Cr:fo
3mm Fused Silica
SFG
SFG
Rep.-RateControl
(1/496nm = 1/833nm+1/1225nm).
GD
-GD/2
MIT Optics & Quantum Electronics Group
Experimental result: Residual timing-jitter
The residual out-of-loop timing-jitter measured from 10mHz to 2.3 MHz is 0.3 fs (a tenth of an optical cycle)
1.00.80.60.40.20.0C
ross
-Cor
rela
tion
Am
plitu
de
-100 0 100
Time [fs]
100806040200Time [s]
Timing jitter 0.30 fs (2.3MHz BW)
Long Term Drift Free
MIT Optics & Quantum Electronics Group
Timing Stabilized Fiber Links (<1km)
Assuming no fiber length fluctuations faster than 2L/c.
Timing Stabilized Fiber Links (<1km)
CrossCorrelatorFiber Link
PZT
Fixed Length L
532 nm Pump laser
10 fs Ti:sapphire laser
Two wavelength filter
Dichroic Beam Splitter
All Fiber Implementationsat 1.5 µm with high repetition rates
MIT Optics & Quantum Electronics Group
Self-balanced sub-10 fs RF-Synchronization
λopt/4
(2n+1) λRF/2
MIT Optics & Quantum Electronics Group
Balanced Cross-Correlator
MIT Optics & Quantum Electronics Group
CASA Seminar 2/6/04 Stefan Simrock DESY
LLRF Subsystems/Components
o RF phase reference - from main driveline - LO for downconvertero Timing Systemo Vector modulatoro Downconvertero Digital Control (Fdbck + FF) - ADC, DSP, DAC - includes exception handlingo Redundant simple feedforwardo Redundant monitoring systemo Transient detectiono Interfaces to other subsystems - includes interlocks
o Waveguide tuner and controlso Cavity resonance control - slow (motor) tuner - fast (piezo) tunero CPU in VME crateo Network to local controlso Cabels and connectorso Power supply for electronicso Airconditioning in rackso Software - DSP (FPGA) code - server programs - client programs - LLRF Parameters - Finite State Machine
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19 January 2004 8:46 pm
/home/simrock/doc/frame/ttf_meeting/ttf_meet_jan_04/ref/llrf_team.fm
LLRF Team
Name Field of Expertise
Ayvazyan, Valeri Software, FSM, DOOCS, Controls, Applications,Linac Operation
Bienkowski, Andrej RF Hardware, analog and digital hardwareBrandt, Alexander Finite state machineBruns, Thomas Computer (Unix) administrationCichalewski, WojciechKoseda, Boguslaw
FSM and applications
Czarski, Tomasz RF Modelling, FPGA development, optimal controlCzuba, Krzysztof M.O. and Distribution, Fiber optic linkEints, Frank HiwiFelber, Matthias HiwiFroelich, Thomas Installation, Documentation, MaintenanceHensler, Olaf DOOCS control system (deputy of K. Rehlich)Grecki, Mariusz TUL-DMCS group leaderIgnachin, NikolaiSytov, Sergei
Analog, digital, and rf electronics
Jezynski, Tomasz FPGA control for RF Gun/XFELKierzkowski, FPGA hardware and programmingKotthaus, Daniel RF Gun ControlLilje, Lutz Piezo tuner, high gradient cavitiesLorbeer, Bastian Master Oscillator and DistributionMakoswki, Dariusz Radiation issues for electronicsMatsumoto, Toshiyushi RF System Modelling, LLRF DevelopmentMoeller, Guenter RF Hardware, Downconverter, vector-mod, rf-gatePawlik, Pawel Single bunch transientPetrosyan, Gevorg DSP programming, DSP code and serverPetrosyan, Lyudvig Timing expert, ADC serverPosniak, Krzysztof FPGA hardware and softwarePucyk, Piotr DOOCS control of FPGARehlich, Kay DOOCS control system (group leader)Romaniuk, Ryzard WUT-ISE group leaderRutkowksy, Peter DOOCS control of FPGARybka, Dominik Radiation damage to electronicsSchrader, Matthias RF ControlSekalski, Przemyslaw Piezotuner and controlSimrock, Stefan LLRF (group leader)Vetrov, Piotr DSP hardware (DSP board, Gigalink, ADC, DAC)Wagner, Richard Hera Protonen HF, NT AdministrationWeddig, Henning RF Hardware, M.O. and Distribution, Analog and
digital electronics, RF MeasurementsZabolotny, Wojciech FPGA hardware and programming
CASA Seminar 2/6/04 Stefan Simrock DESY
Summary
• Commissioning of LLRF for TTF II is well underway • Feedforward for ACC 4,5,6 (old IQ drivers) available • New C67 based DSP System for RF Gun and ACC1 under
commissioning. In operation with cavity simulator • New “field” detectors for RF Gun • Prototype of FPGA based controller and cavity simulator
• Master oscillator and frequency distribution are presently being installed
• New frequencies (2856 MHz, 13.5 MHz) • Temperature stabilized coaxial distribution • Highly stable fiber optic monitoring system
• Automation of LLRF operation under development