1. CTF3 Collaboration Board May 2009 G.Geschonke
Status of CTF3
G.Geschonke
CERN
CTF3 Collaboration Board May 2009 G.Geschonke

2. Contributions (September 2008)
to be updated!!
CTF3 Collaboration Board May 2009 G.Geschonke

3. CTF3 Collaboration Board May 2009 G.Geschonke
New contributions
Ciemat: tanks and assembly of 3 more PETS 100 k€
(without rods and brazed parts)
IFIC Valencia: all Beam position monitors for TBL,
UPC Barcelona: all BPM analog electronics
LAPP: All digital electronics for TBL BPMs + developments for CLIC
4. CLIC/CTF3
Objet
Matériel
Main d'oeuvre
Prix MO
Total
Remarques
(k€)
(hommes-mois)
4.1
Participations aux études et instrumentation faisceau 12
107,04
CEA
Participations au design des cavités
4.2.1
CLIC module
249 6
53,5
302,5
4.2.2
12 GHz RF network components for 8 PETS in TBL
218 5
44,6
262,6
Construction d'un test stand 12 GHz
4.3.1
Modulateur
398
107,0
505,0
4.3.2
Compresseur de pulse RF
156
263,0
4.3.3
Réseau et composants RF 50 1
8,9
58,9
4.4.1
Participation to the stabilisation of optical elements
Instrumentation spécifique (LAPP/CNRS) 74 36
321,1
395,1
CNRS
4.4.2
Instrumentation spécifique (IRFU/CEA)
157,0
4.5
Studies on CLIC positron sources
(LAL) 24
Sous-total
1195
120
856,1
2051,1
French white paper contribution:
CTF3 Collaboration Board May 2009 G.Geschonke

4. CTF3 Collaboration Board May 2009 G.Geschonke
New collaborations II
Greece:
NTU Athens : Two senior physicists, two students for two years
University Patras: Two senior engineers, two students for two years
University patras: One senior physicist, one senior engineer, two students
for two years
University Karlsruhe:
0.2 FTE SC specialists,
PhD student
CTF3 Collaboration Board May 2009 G.Geschonke

5. CTF3 Collaboration Board May 2009 G.Geschonke
Present CTF3 status
2004
2005
Thermionic gun
Linac DL CR
2006/7
CLEX
building in 2006/7
30 GHz production
(PETS line)
and test stand
Photo injector / laser
tests from Oct. 2008
TL2 2008
CLEX building:
Everything installed (except TBL)
Commissioning started
CTF3 Collaboration Board May 2009 G.Geschonke

6. Status CLEX (CLIC Experimental Area)
existing building
Beam from CR/TL2
Test Beam Line TBL
Two Beam Test Stand
Probe Beam
All Beam lines installed, except TBL and operated with beam !
(ITB is not part of the base-line programme)
CTF3 Collaboration Board May 2009 G.Geschonke

7. CTF3 Collaboration Board May 2009 G.Geschonke
Organisation
Project management at CERN
regular installation / operation meetings
CTF3 Committee
Monthly meetings on Thursday afternoon,
participation via WebEx possible
CTF3 Collaboration meeting
Plenary meeting once a year,
well attended by almost all collaborating institutes
last: January 2009
With the machine almost finished, shall we continue? (I think yes )
CTF3 Collaboration Board May 2009 G.Geschonke

8. New installations: RF deflectors
CTF3 Collaboration Board May 2009 G.Geschonke

9. CTF3 combiner ring - latest status
Recombination at higher current achieved
DL bypassed (no holes, missing factor 2)
2nd turn of 1st pulse and 1st turn of 2nd pulse
1st turn of 1st pulse
3rd turn of 1st pulse, 2nd turn of 2nd pulse, 1st turn of 3rd pulse
All 4 pulses
280 ns
Current (A)

10. New Installation: Tail clipper
shorten bunch trains into CLEX
Beam dump after Combiner Ring
beam from CR
strip-line kicker
CIEMAT
Beam to CLEX
movable beam dump
(CERN)
CTF3 Collaboration Board May 2009 G.Geschonke

11. CTF3 Collaboration Board May 2009 G.Geschonke
Tail Clipper
Strip-line kicker
Pulser
CTF3 Collaboration Board May 2009 G.Geschonke

12. New installation: Tail Clipper II
A combination of internal and external shielding was implemented in the design:
Internal: A Cu absorber (12cm) was added downstream to the graphite core
The absorbed dose in the quadrupole magnet was reduced to 18MGy after one year operation
External: 10cm-thick lead plate added downstream the TCC
CTF3 Collaboration Board May 2009 G.Geschonke

13. CDR Experiment after Combiner Ring
CTF3 Collaboration Board May 2009 G.Geschonke

14. CTF3 Collaboration Board May 2009 G.Geschonke
CDR Experiment
• Installed the interferometer (right hand picture)
• Photo diode (incl. beam splitter) in the OTR optical line installed (left hand picture)
First signals observed !
CTF3 Collaboration Board May 2009 G.Geschonke

15. CTF3 Collaboration Board May 2009 G.Geschonke
Probe Beam
Overall responsibility of IRFU (DAPNIA), CEA, Saclay,
RF gun responsibility of LAL
200 MeV
bunch charge 0.5 nC
number of bunches
15 MV/m
compression
17 MV/m
acceleration
LIL sections
beam dump
focusing coils K
quadrupoles
Laser
RF pulse compression
2 x 45 MW 10 20 25
profile monitor
position monitor
steerer
rf gun cavity
spect. magnet
RF deflector
C A L I F E S
A. Mosnier, CEA Dapnia
CTF3 Collaboration Board May 2009 G.Geschonke

16. CTF3 Collaboration Board May 2009 G.Geschonke
Klystron and BOC
Califes
Photo Injector
waveguide RF distribution
Accelerating sections
RF deflector for diagnostics
CTF3 Collaboration Board May 2009 G.Geschonke

17. CTF3 Collaboration Board May 2009 G.Geschonke
Califes
Second commissioning phase from 30th of March to 9th of April 2009
A laser system in a nearly perfect reliable working state (no longer use of the dark current)
Missing: power phase shifter of the section 1 (its construction progresses carefully)
Laser pulses 7 ns (10 bunches)
QE = 0.5%, 0.2 nC/bunch
UV Laser energy/bunch: 0.29 mJ (nominal 1.93)
Optics measurements started
reentrant cavity BPS commissioned
CTF3 Collaboration Board May 2009 G.Geschonke

18. CTF3 Collaboration Board May 2009 G.Geschonke
Two Beam test Stand
All hardware installed !
Commissioning with beam ongoing
Beam in both lines up to end !
PETS (CERN) was installed in October,
first accelerating structure in 2009
CTF3 Collaboration Board May 2009 G.Geschonke

19. PETS high power tests at CERN (TBTS)
Model with time dependant coupling and phase
Igor Syratchev
Model with constant coupling and phase
Event with breakdown
coupling
Event with breakdown
phase
The full scale PETS testing will be restarted in June 2009

20. CTF3 Collaboration Board May 2009 G.Geschonke

21. CTF3 Collaboration Board May 2009 G.Geschonke
Test Beam Line TBL
High energy-spread beam transport
decelerate to 50 % beam energy
Drive Beam stability
Stability of RF power extraction
total power in 16 PETS: 2.5 GW
Alignment procedures
PETS design
5 MV/m deceleration (35 A)
165 MV output Power
PETS development: CIEMAT
BPM: IFIC Valencia
and UPC Barcelona
2 standard cells, 16 total
CTF3 Collaboration Board May 2009 G.Geschonke

22. CTF3 Collaboration Board May 2009 G.Geschonke
TBL
Prototype PETS + vacuum tank (CIEMAT) installed
Precision quadrupole movers are being built by CIEMAT,
three installed
CTF3 Collaboration Board May 2009 G.Geschonke

23. CTF3 Collaboration Board May 2009 G.Geschonke
TBL
All quadrupole magnets (BINP) at CERN
Prototype BPM (BPS) installed, tested. Series ordered (IFIC)
Read-out electronics will be provided by UPC and LAPP
All vacuum equipment available
In summary: everything covered, except 15 PETS
Tender for 7 more will go out in the next weeks (only bars)
three tanks + assembly at Ciemat
the remaining 4 to be taken care of by CERN
installation summer 2010
Eight to be ordered in 2010.
CTF3 Collaboration Board May 2009 G.Geschonke

24. CTF3 Collaboration Board May 2009 G.Geschonke
Photo Injector - laser
smaller emittance, faster phase coding, no “satellite bunches”
LAL
CERN
RAL
Cs2Te photo cathode
3% QE
40 hours life time
pulse train: 1.5 ms,
charge per bunch: 2.33 nC
bunch spacing 0.67 ns
number of bunches: 2332
diode pumped Nd:YLF laser
10 mJ IR / bunch
0.37 mJ UV on cathode /bunch
Laser made enormous progress:
PHIN: about 2/3 of nominal energy on cathode (360 nJ, 250 nJ nominal)
 nominal charge/bunch 2.3 nC
Califes: 200 nJ / 900 nominal
Laser line finished (DEPARTEMENT DE PHYSICO-CHIMIE, DEN/Saclay
 0.2 nC
Phase-coding missing
CTF3 Collaboration Board May 2009 G.Geschonke

25. CTF3 Collaboration Board May 2009 G.Geschonke
Status of the PHIN photoinjector
PHIN-2 gun brazed at LAL – tested o.k. -
delivery of PHIN-2 gun from LAL to CERN: 20 May
preparation for bake-out, installation + assembly
(with help from LAL – MERCI!), waveguides, etc.
? ready in September ? – yes !
RF conditioning:
started in October shutdown
(klystron shared with
Combiner Ring deflectors)
CTF3 Collaboration Board May 2009 G.Geschonke

26. Photoinjector PHIN very successful runs end 2008/2009
With beam
very successful runs end 2008/2009
transverse optics + beam-loading studies
long-term behavior (Qe) to be studied
Phase coding to be demonstrated
PHIN design
achieved Apr. 2009
RF power [MW] unloaded 13
beam energy [MeV]
5-6
5.3
number of bunches
1908
3000
bunch spacing [ps]
666.7
charge per bunch [nC]
2.3 ~
repetition rate [Hz] 5
0.8
bunch length FWHM [ps]
< 10
< 10 ?
rms. energy spread [%]
< 2
0.5
n. emittance [p mm mrad]
< 25
5-7
vacuum pressure [mbar]
< 2 x 10-10
< 4 x 109 (no NEC)

27. 12 GHz stand-alone Test-Stand
schedule from last September:
Project Meeting 08/2008 27
CTF3 Collaboration Board May 2009 G.Geschonke

28. RF power testing 12 GHz stand-alone power source
klystron is being produced at SLAC
Final tests at SLAC: December 2009
Delivery to CERN: March 2010
Modulator to be ordered by IRFU (white paper) ????
starts to be on the critical path
all the rest is on track
30 GHz programme is coming to an end in 2009
CTF3 Collaboration Board May 2009 G.Geschonke
Derived from NLC 11.4 GHz klystron

29. Except TBL all beam lines are complete
Conclusions
Exciting year ahead for operation:
Full bunch combination with phase-coding, Delay Loop and Combiner Ring
Operate Two-Beam Test Stand for structure / PETS tests
Continue Califes commissioning
Test TBL PETS
Except TBL all beam lines are complete
12 GHz power stand on critical path
Very good perspectives to meet our goals in 2010
CTF3 Collaboration Board May 2009 G.Geschonke

30. CTF3 operation
1 staff + 1 fellow + 1 Research Associate operate routinely the machine
+ support from other staff partially + 1 fellow for stability/feed-back studies
1 white paper post to be opened now
maximize run time by 2 ‘shifts’ per day presently not done any more
Supervision of linac by shift operators foreseen and starting
Weekly supervisor to coordinate activity
Daily commissioning meeting
Remarks:
Work concentrated on commissioning of new components
Increased complexity
Higher demand for availability of components
Full recombination (DL + CR) to be demonstrated
Operation becomes more demanding in terms of stability
Review the performance and identify bottlenecks