CARE SC meeting, CERN, 13th September, 2006.

Report on SRF Work-packages 7 - 11

WP7 Power CouplersWP8 TunersWP9 Low level RFWP10 Horizontal Cryostat IntegrationWP11 Beam Diagnostics

CARE SC meeting, CERN, 13th September, 2006.

Power Couplers

• Task 7.1 New proto-types– “All-brazed” couplers received from CPI

following TiN coating (just last week).– 2 TTF-V couplers received prior to summer

vacation. Not centered on 1300 MHz! S11 is only 11 dB.

– Second pair of TTF-V couplers had window coating problem. They will be re-coated.

CARE SC meeting, CERN, 13th September, 2006.

Top right: TTF-V windowTop left: TW60 windowBottom: Wave-guide test box.

Insufficient TiN coating

CARE SC meeting, CERN, 13th September, 2006.

Power Couplers

Task 7.2 Construction of TiN coating BenchContract signed with Italian company for construction

of bench. Delivery ~ July 2007.Based on magnetron sputtering under vacuum.Tests have been performed on TiN samples coated on an alumina substrate to verify the chemical composition.

CARE SC meeting, CERN, 13th September, 2006.

RF power as a function of time for different pulse widths.

Electron activity as a function of RF power and pulse width.

Power Couplers

Task 7.3: Coupler Conditioning Studies

CARE SC meeting, CERN, 13th September, 2006.

Power Couplers

CARE SC meeting, CERN, 13th September, 2006.

WP7 schedule

Nr. TaskBegin of task

End of task

finished end 05

finished April 06

7.1 New Prototype Coupler 01/01/04 15/07/06 50% 95%7.1.1 RF Simulations of Coupler 01/01/04 30/06/04 100% 100%7.1.2 Report on Simulation 30/06/04 30/06/04 100% 100%7.1.3 Detailed Engineering Drawings 01/07/04 31/12/04 100% 100%7.1.4 Engineering complete 31/12/04 31/12/04 100% 100%7.1.5 Call for tenders 03/01/05 01/04/05 100% 100%7.1.6 Prototype Fabrication in Industry 05/04/05 31/05/06 0% 95%7.1.7 Low Power tests 31/05/06 30/06/06 0% 25%7.1.8 Ready for High Power Tests 15/07/06 15/07/06 0% 0%7.2 Fabrication of TiN Coating System 03/01/05 01/12/06 0% 25%7.2.1 Mechanical design of vacuum chamber 03/01/05 29/04/05 0% 20%7.2.2 Fabrication drawings 02/05/05 30/08/05 0% 10%7.2.3 Construction of vacuum chamber 01/09/05 01/09/06 0% 0%7.2.4 Define vacuum needs 03/04/06 30/06/06 0% 50%7.2.5 Appropriation of vacuum equipment 03/07/06 30/09/06 0% 0%7.2.6 Design of electronic circuitry 01/09/05 30/03/06 0% 0%7.2.7 Fabrication of electronics in industry 03/04/06 29/09/06 0% 0%7.2.8 Installation and Test at Orsay 02/10/06 30/11/06 0% 0%7.2.9 First Window Coating 01/12/06 01/12/06 0% 0%7.3 Conditioning Studies of Proto-type Couplers 02/01/06 30/11/07 0% 10%7.3.1 Conditioning of couplers 02/01/06 30/11/07 0% 10%7.3.2 Evaluate conditioning results 04/01/06 30/11/07 0% 0%7.3.3 Final report on conditioning 30/11/07 30/11/07 0% 0%

CARE SC meeting, CERN, 13th September, 2006.

Nr. Task Begin of

task End of

task finished

end 05 finished April 06

8.4 IN2P3 Activity 01/01/04 07/08/06 52% 85%

8.4.1 Characterize actuators/piezo-sensors at low temperature 01/01/04 21/03/05 95% 95%

8.4.2 Report on actuator/piezo sensor 21/03/05 21/03/05 60% 80%

8.4.3 Test radiation hardness of piezo tuners 01/07/04 15/08/05 100% 100%

8.4.4 Report on radiation hardness tests 15/08/05 15/08/05 50% 80%

8.4.5 Integration of piezo and cold tuner 03/01/05 06/12/05 20% 100%

8.4.6 Cryostat tests 06/12/05 03/02/06 0% 100%

8.4.7 Tests with pulsed RF 03/02/06 07/08/06 0% 100%

8.4.8 Report on IN2P3 tuner activities 07/08/06 07/08/06 0% 40%

CARE SC meeting, CERN, 13th September, 2006.

Low Level RF

Task 9.1-Transient detector connected in ACC1Electronics improved to allow un-interrupted operation.

Task-9.2.2 On-line radiation monitor installed

No report from Work-package leader !!!

CARE SC meeting, CERN, 13th September, 2006.

Cryostat Integration Tests

CryHoLab being shipped to main Saclaysite in summer of this year.

Seven months needed to be operational again.

CARE SC meeting, CERN, 13th September, 2006.

Modification needed for cavity flange

WP10 Schedule

CARE SC meeting, CERN, 13th September, 2006.

‘BPM DESY’

BPM 14ACC7

Re-entrant BPM Tests at DESY – August 2006

CARE SC meeting, CERN, 13th September, 2006.

• Good linearity

• Apparent lack of symmetry

• Maybe due to steering magnets (saturation, residual field) ??

Summary of BPM tests in August 2006 – 1/2

CARE SC meeting, CERN, 13th September, 2006.

• RMS resolution: ~ 40 µm (depending on beam jitter)

• Theoretical resolution: 15 µm

• Aim to improve the resolution while maintaining the dynamci range

• Remove attenuators (~ -3 dB) ---> resolution <10µm (in theory)

• Change the power mixer (input RF power ~ 16 dBm) ---> resolution < 1 µm (theoretically)

Summary of BPM tests in August 2006 - 2/2

CARE SC meeting, CERN, 13th September, 2006.

Status of HOM Activity at FLASH

• Cavity relative misalignments measured in ACC4 and ACC5

• BPM-like resolution measured around 10 µm for position and 200 µrad for angle

• Thesis of Rita Paparella finished, examination on September 22.

• Journal publication submitted collectively to PRST-AB, this month.

Residual of the x offset prediction using the HOM analysis for cavity #5

in module #5.

CARE SC meeting, CERN, 13th September, 2006.

Nr. TaskBegin of task

End of task

finished Apr 05

finished Jul 05

finished Aug 06

11 WP 11 BEAM DIAGNOSTICS 1/1/04 28/5/08 19%11.1 Beam position monitor 1/1/04 12/12/07 16%11.1.1 Present BPM installed in TTF module 30/6/04 30/6/04 100% 100% 100%11.1.2 Cryogenic measurements on BPM 1/7/04 6/8/04 100% 100% 100%11.1.3 Beam tests of BPM on TTF 9/8/04 3/10/05 60% 60% 90%11.1.4 Design of BPM Cavity 1/1/04 25/3/05 70% 100% 100%11.1.5 Design of BPM cavity ready 25/3/05 25/3/05 0% 100% 100%11.1.6 Fabrication of BPM Cavity 1/9/05 23/12/05 0% 0% 100%11.1.7 BMP cavity ready 23/9/05 15/2/05 0% 0% 100%11.1.8 Development of new hybrid coupler and electronics 5/7/04 5/7/05 10% 100% 100%11.1.9 Design of Digital Signal Processing 3/1/05 17/8/06 0% 80% 80%11.1.10 New BPM ready for Installation 1/1/06 31/8/06 0% 0% 100%11.1.11 Beam Tests with new BPM 2/1/06 12/12/07 0% 0% 20%11.1.12 Evaluation of BPM operation 12/12/07 12/12/07 0% 0% 0%11.2 Beam Emittance Monitor 1/1/04 28/5/08 22% 60%11.2.1 Slit width simulations 1/1/04 2/4/04 100% 100%11.2.2 Slit design 5/4/04 2/7/04 90% 100%11.2.3 Optics simulations 5/4/04 2/7/04 95% 100%11.2.4 Optics appropriations 5/7/04 15/8/05 25% 100%11.2.5 System assembly and tests 25/10/04 30/9/05 25% 100%11.2.6 Mechanical assembly at TTF 3/10/05 2/11/05 0% 100%11.2.7 Optical assembly at TTF 3/11/05 1/12/05 0% 100%11.2.8 Integration of controls into TTF 2/12/05 31/12/05 0% 100%11.2.9 Ready for beam test in TTF 31/12/05 31/12/05 0% 100%11.2.10 Beam tests at TTF 2/1/06 2/6/06 0% 100%11.2.11 Evaluate first beam test result 2/6/06 2/6/06 0% 100%11.2.12 Successive measurements 5/6/06 28/5/08 0% 0%11.2.13 Final evaluation 28/5/08 28/5/08 0% 0%

Summary of BPM tests in August 2006