ILC Program discussion M. Ross 14.09.2004

TTF2 - long term scheduleModul status

Plans for production(Hans Weise and Bernd Petersen – TESLA Coll. Technical Board meeting, 07.09.2004 – last week)

SLAC involvement

Saturation in wavelength range 30-120 nm July 2005

User operation (extended period)

Operation with long bunch train Dec. 2005

User operation (extended period)

3rd Harmonic RF system and ACC6 installed Feb. 2006

1 GeV beam energy (total 48 cav ~=meters) April 2006

Saturation 6 nm June 2006

User operation (extended period)

Seeding Option installed Dec. 2006

Seeding demonstration April 2007

Schedule until 2007

https://ttfinfo.desy.de

The TTF electronic logbook

Schedule looks like being FEL dominated. Is this true?

For 2005 we assume

9 weeks of FEL user operation

2 months FEL studies

2 months accelerator studies (diagn. etc.)includes photon diagnostics

2 months of dedicated acc.module tests

This means: 4 months to be discussed

A must:

- HPP of the relevant cavities M5/C6, M1/C8(?). Others ???

- long time operation of M5 at high gradients in steps from 20 MV/m to 25+MV/m:

- what are the typical problems?

- any change in dark current?

- how close can we go to the gradient limit?

-processing behaviour after interruptions / shut down

ACC1(M2*) HPP of C7.(Z53)

if not successful, attenuator in order to get 4x15MV/m and 4x20MV/m average

ACC2(M1*) optimze attenuators of cavities C1, C2, and C6 so that we get 22MV/m average

ACC3(M3*) HPP of C7 (S28)

ACC4(M4) measure Qo / Eacc between 15 and 24MV/m

long time operation at highest possible gradients incl. measurement of dynamic losses at 2K, 4K, and 40/80 K

ACC5(M5) dark current measurement C6 (AC77) -> HPP -> dark current

if required, attenuator C6

attenuator for C8 (AC60 limits module at 25MV/m

measure Qo / Eacc between 15 and 28/30? MV/m average

long time operation at 25MV/m and at max. gradient incl. measurement of dynamic losses at 2K, 4K, and 40/80K

==> at gradients >15MV/m we never measured the dyn. losses of a complete module at 4k and 40/80K

ACC6(M6) 8 EP-cavities at 35MV/m

8 modified tuners with piezos

2K-magnet

The individual modules

In General

- develop robust algorithm for Lorentz force compensation and test with piezo tuners at M6 and M1/C5.

- failure recogination and exception handling, esp.close to performance limit

- measurement and optimization of amplitude and phase stability (within bunch train, from train to train, long time)

- automized operation (FSM) of LLRF

- test next generation of LLRF (developed for XFEL: increased ampl. and phase stability requirements)

- beam based feedback algorithms (energy, phase, bunch length)

Cavities @ ACC1

1 - Z54 2 - Z51 3 - D42 4 - D37 5 - AC72 6 - C47 7 - Z53 8 - AC690

5

10

15

20

25

30

35

FE

Mod

ule

23.04.2004

Module 2*

EA

CC [M

V/m

]

Cavity

Cryostat tests: Vertical Horizontal Module

EP cavity

Cavities @ ACC2

1 - S31 2 - C44 3 - C46 4 - S36 5 - D2 6 - A18 7 - D1 8 - A170

5

10

15

20

25

30

35

Mod

ule

5.11.2002

Module 1*

EA

CC [

MV

/m]

Cavity

Cryostat tests: Vertical Horizontal Module

Cavities @ ACC3

1 - D41 2 - S32 3 - S29 4 - S30 5 - AC58 6 - D40 7 - S28 8 - Z500

5

10

15

20

25

30

35

Mod

ule

BD

coup

ler

Module 3*

14.09.2003

EA

CC [

MV

/m]

Cavity

Cavity tests: Vertical (CW) Horizontal (10Hz) Module 3 (10Hz)

Module 3* (5Hz)O

OFT 500+100s

Couplers conditioning was not completed before the module measurement : coupler 4 vac.valve was closed. Conditioning completed later. During Module 3 disassembly couplers antennae touched cavity surface.

Cavities @ ACC4

1 - C48 2 - S34 3 - AC57 4 - AC56 5 - AC55 6 - AC59 7 - Z52 8 - AC640

5

10

15

20

25

30

35

Mo

du

le

BD

BD

BD

BD

Module 4

01.06.2004

EA

CC [M

V/m

]

Cavity

Cavity tests: Vertical (CW) Horizontal (10Hz) Module 4 (5Hz)

Cavities @ ACC5

1 - AC62 2 - AC61 3 - AC65 4 - AC66 5 - AC79 6 - AC77 7 - AC63 8 - AC600

5

10

15

20

25

30

35

BD

dark current src

Module 5

14.09.2003

EA

CC [

MV

/m]

Cavity

Cavity tests: Vertical (CW) Horizontal (10Hz) Module 5 (1Hz) Module 5 (5Hz)

Cavity preparation general comments

After several technical problems: EP is working now reliably

General assumptions for schedules:

no 1400 C treatment of new cavities

Requirement for next modules: 35 MV/m for each cavity

Assumption for the schedules: Each second cavity will reach 35 MV/m ( this is also assumed for retreated cavities) with reference to latest experience

CHECHIA test for each cavity

Modul 6 needs cavities out of the new ZANON productionNot yet considered in the schedules:

Clean room will need 3 weeks of maintenance/repair in the next months

Performance of some Cavities EP re-treated at DESY(already limited performance after BCP )

Cavity Eacc before EP Eacc after EP +120 C baking Q0 @23,5 limit

1b8 28 33,59 38 1,7E10 BD

1s2 31,5 31,5 36,6 1,5E10 BD

1ac 2 34,8 31,5 40,5 1,7 E10 BD

ac 78 15,3 - 23,7 2,9E10 BD

ac 78 20,7 15 - 1,7E10 BD

p-1 0,5 10,6 - 7,6E8 Power

p-1 10,6 25,3 - 1,4E10 BD

ac 70 19 30 39,4 1,7E10 BD

ac 80 0,5 27,5 - 1,7E10 BD

ac 80 27,5 28 - 1,6E10 BD

ac 71

31,5 29 1,2E10 FE

ac 74

28 19,8 6E9 BD+FE

Next cryomodulesModul 6 : ‚high gradient module‘, all cavities 35 MV/m, type III design:

Ready : May 2005

Modul 7: ‚ linac spare module‘, type II design

TESLA meeting at ZEUTHEN -> all cavities EP treated, 35 MV/m

Helium vessel of type III have to be produced !!! -> decision needed

(type II cavities& vessels available, flanges have to be exchanged)

Ready : December 2005

Schedule Module 6 (Axel Matheisen)ID Vorgangsname Start Finish Duration

1 Modul 6 Wed 14.07.04 Wed 09.02.05 150.43 dys?

2 AC 70 Wed 14.07.04 Wed 14.07.04 1 dy?

3 fertig Wed 14.07.04 Wed 14.07.04 1 dy?

4 Ac 72 Wed 14.07.04 Wed 14.07.04 1 dy?

5 fertig Wed 14.07.04 Wed 14.07.04 1 dy?

6 z82 Thu 15.07.04 Mon 06.09.04 38 dys?

37

38 z83 Thu 15.07.04 Thu 16.09.04 46 dys?

64

65 z84 Tue 20.07.04 Wed 06.10.04 57 dys?

91

92 Ac 80 Wed 14.07.04 Wed 22.09.04 50.33 dys

114

115 AC 81 Wed 14.07.04 Wed 15.09.04 45.67 dys

125

126 Z82 ok Tue 07.09.04 Wed 03.11.04 41.33 dys

139

140 Z84 ok Thu 07.10.04 Wed 01.12.04 39.33 dys

153

154 Ac 71 Wed 14.07.04 Wed 28.07.04 10.67 dys

164

165 Ac74 Wed 14.07.04 Wed 20.10.04 70.33 dys

187

188 Ac75 Wed 14.07.04 Tue 31.08.04 34.67 dys

198

199 AC76 Wed 14.07.04 Wed 17.11.04 90.33 dys

221

222 Ac75 II Tue 31.08.04 Thu 16.09.04 12 dys

232

233 Ac71 II Wed 28.07.04 Wed 06.10.04 49.67 dys

255

256 Z85 Fri 01.10.04 Tue 16.11.04 33 dys?

280

281 Z86 Mon 11.10.04 Wed 12.01.05 67.43 dys?

317

318 continuency Wed 12.01.05 Wed 09.02.05 20 dys

319 cont Wed 12.01.05 Wed 09.02.05 20 dys

320

321 module 6 assembly Wed 09.02.05 Fri 25.03.05 32 dys

325

326 modul 7 neue cv nur ep 1 out of 2 Thu 10.02.05 Thu 22.09.05 161 dys

327 anlieferung ersters cv bis ende Thu 10.02.05 Fri 26.08.05 142 dys

May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr2nd Quarter 3rd Quarter 4th Quarter 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter 1st Quarter 2nd Quarter

Cryomodule partsTuners: ( at present no piezo tuners available !!!)

Mechanical parts for 17 tuners on DESY site ( incl. 2 ‚mirrored‘)

To be delivered this week:

16 control units + 12 motors

Another 7 motors will arrive in about 3 weeks from now

Magnet packages:

1 TTF-design package ready on DESY site ( + 1 Sstruct)

1 TESLA-design coil will be delivered to DESY in October 04

(TESLA-design package can be used in modul 6 without BPM)

BPMs : ??? 2 old TTF-type available

Main couplers ( 40 ordered): type III couplers for module 6 at Desy, 30 DESY type III couplers will be delivered to Orsay until end of this year

Cryomodule parts (cont.)modules beyond 6 &7

modules cavities Cold mass

+ v-vessel

tuners magnets He-

vessels

BPM Main Couplers

Total

Available now

30 1 type II

1 type III

17 2 TTF

1 TESLA

20 type III

40

6piezos

?

7 Old? Sstruct piezos8 II ?

8XFEL Type ? 4

9 2 XFEL-type ?

8

Single Module Test Stand( Yury Bozhko –MKS1-)

Some details:

Cryogenic equipment:

After EU call for tender now in the process of making contracts

RF-equipment:

Modulator, puls-transformer on DESY site

Klystron ordered, will be delivered in 2005

Call for tender for wave guides etc….

Civil engineering:

Final specifications ready, procedures prepared and will be started now

Single Module Test Stand (Yury Bozhko)

ID Vorgangsname Duration Start Finish

1 Cryomodule Test Bench 429 dys Tue 01.06.04 Fri 20.01.06

2 Civil engineering/building 220 dys Mon 06.09.04 Fri 08.07.05

3 test hall 220 dys Mon 06.09.04 Fri 08.07.05

4 building permit 3 mons Mon 20.09.04 Fri 10.12.04

5 demolishing the Nissen hut 2 wks Mon 04.10.04 Fri 15.10.04

6 cutting trees 1 mon Mon 18.10.04 Fri 12.11.04

7 tubing the stream 1 mon Mon 18.10.04 Fri 12.11.04

8 hardening ground 2 wks Mon 15.11.04 Fri 26.11.04

9 specification for test hall 1 mon Mon 06.09.04 Fri 01.10.04

10 call for tenders 2 mons Mon 04.10.04 Fri 26.11.04

11 contract 2 mons Mon 29.11.04 Fri 21.01.05

12 erecting the hall 6 mons Mon 24.01.05 Fri 08.07.05

13 line of construction 80 dys Mon 13.09.04 Fri 31.12.04

14 specification 1 mon Mon 13.09.04 Fri 08.10.04

15 fundaments 30 dys Mon 11.10.04 Fri 19.11.04

16 manufacturing 30 dys Mon 11.10.04 Fri 19.11.04

17 mounting 30 dys Mon 22.11.04 Fri 31.12.04

18 shielding 85 dys Mon 06.09.04 Fri 31.12.04

19 specification 3 wks Mon 06.09.04 Fri 24.09.04

20 call for tenders 6 wks Mon 27.09.04 Fri 05.11.04

21 contract & 1st payment 40 dys Mon 08.11.04 Fri 31.12.04

22 Cryogenics 369 dys Tue 01.06.04 Fri 28.10.05

23 Feed-box,-cap, end-cap 369 dys Tue 01.06.04 Fri 28.10.05

24 call for tenders 79 dys Tue 01.06.04 Fri 17.09.04

25 contract 2 mons Mon 20.09.04 Fri 12.11.04

26 design/construction 250 dys Mon 15.11.04 Fri 28.10.05

27 Transfer line 369 dys Tue 01.06.04 Fri 28.10.05

28 call for tenders 79 dys Tue 01.06.04 Fri 17.09.04

29 contract 2 mons Mon 20.09.04 Fri 12.11.04

30 design/construction 11 mons Mon 15.11.04 Fri 16.09.05

31 installation 1.5 mons Mon 19.09.05 Fri 28.10.05

32 warm valves 265 dys Wed 01.09.04 Tue 06.09.05

33 specification 30 dys Wed 01.09.04 Tue 12.10.04

34 procurement 2 mons Wed 13.10.04 Tue 07.12.04

35 construction,delivery 6 mons Wed 23.03.05 Tue 06.09.05

36 warm gas tubing 120 dys Wed 23.03.05 Tue 06.09.05

37 construction 6 mons Wed 23.03.05 Tue 06.09.05

38 cryo-controls 178 dys Mon 03.01.05 Wed 07.09.05

39 hardware 120 dys Mon 03.01.05 Fri 17.06.05

40 software 143 dys Mon 21.02.05 Wed 07.09.05

41 RF-Euquipment 60 dys Mon 11.07.05 Fri 30.09.05

42 RF and LL-RF 3 mons Mon 11.07.05 Fri 30.09.05

43 commissioning 60 dys Mon 31.10.05 Fri 20.01.06

44 first operation 3 mons Mon 31.10.05 Fri 20.01.06

May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan2004 2005 2006

First operation / commissioning: November 2005

SLAC participation in TTF2 program – discussions from the Orsay Tesla collaboration meeting

1) Our near-term program is to commission the longitudinal phase space monitor – transverse cavity ‘LOLA IV’ and provide long term tools that facilitate its use.

2) We proposed SLAC participation at TTF2 for the following (basically in response to informal ‘feelers’). 1) HOM signals for position measurement2) Cavity dark current3) Optical fiber-based stable RF distribution4) Beam – based alignment

3) Less formal discussions were held on:1) Beam phase monitoring2) Hardware development – power supplies3) LLRF (commissioning and learning)

4) There is an operating laserwire in the PETRA ring – (RHUL/DESY/Oxford)

Each one deserves a thesis in itself – some are critical for LC design / construction

Transverse deflection cavity studies

1. Goal:

• Prove the device for measurement of ultra-short bunch length, energy correlations and transverse slice emittance

• Precision, calibrated tool for complex physical process

• Vital for FEL and LC

• Develop the application software to facilitate its use

• Beam dynamics tests of CSR-generated emittance growth

2. Resolution:

• 10um σ_z (30fs) (50m β, 600MeV)

• Vertical kick allows measurement of Є_x vs z, δ vs z on different screens

3. Study of incoming correlations – ‘pitch’ angle

Martin Nagl, Holger Schlarb, Karsten Klose

Higher Order Mode studies

1. Goal:

1. Prove use of HOM for cavity beam position absolute measurement

2. Develop system for HOM use to minimize wakes and emittance growth

3. Cavity / cryomodule fab / assy alignment test

2. Resolution

1. ~50μm

2. Offset / phase shift caused by coupler location(s) ~150 μm depending on which mode (Dohlus)

3. Test / compare beam – based alignment using quad shunt

Nicoleta Baboi, Rita Papparella, Olivier Napoly

Dark Current Studies

1. Goal:

1. Measure on axis (up / down) cavity dark I over long term

2. Build, install and equip (controls and signal processing) simple single cell external cavity

2. Resolution

1. ~1 nA accuracy for each module

2. (30pA is thermal limit with moderate shunt impedance)

3. There is no precision dark I monitor in Checchia (single cavity horizontal test stand) – recent measurements use radiation monitors

1. Vertical test stand coupler/valve geometry precludes their use

Hans Weise and Manfred Wendt

Stabilized – optical fiber RF distribution

1. SLAC equipment donated to TTF (was unused at SLAC)

1. Fiber, fiber stretcher, xmit/receive, fiber couplers

2. Student project to use this hardware (+ much more needed) to build a stabilized link.

3. ~100fs / multi-km stability (200 fs demonstrated in 2001)

1. FEL requirements are much tighter – but for somewhat shorter distances (20fs / 1 km – 5e-9)

Henning Weddig / Stefan Simrock / students