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3 rd SPL Collaboration Meeting (CERN, 12 November 2009). IN2P3 Les deux infinis. RF Conditioning of TTF3 Input Power Couplers & Acceptance Criteria for XFEL. Lucija Lukovac (LAL). Overview. RF conditioning of TTF3 power couplers Power coupler specifications

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rf conditioning of ttf3 input power couplers acceptance criteria for xfel

3rd SPL Collaboration Meeting

(CERN, 12 November 2009)

IN2P3

Les deux infinis

RF Conditioning of TTF3 Input Power Couplers & Acceptance Criteria for XFEL

Lucija Lukovac (LAL)

slide2

Overview

  • RF conditioning of TTF3 power couplers
  • Power coupler specifications
  • RF conditioning procedure
  • Results
  • Acceptance criteria for XFEL power couplers
  • Power coupler specifications
  • Conditioning
  • Accepting a coupler : good or excellent?
slide3

RF conditioning of TTF3 power couplers

TTF3 input power coupler specifications

slide4

RF conditioning of TTF3 power couplers

RF conditioning procedure

Warm test stand : travelling wave mode @ LAL

Procedure

Test stand

Control parameters

Cryomodule - reconditioning : standing wave mode @ DESY

Off resonance = Warm test stand

On resonance 20 μs -> 200 μs Pmax = 1 MW

400 μs Pmax = 330 kW

500 μsflat top + flat top 100 μs, 200 μs, 400 μs, 800 μs Pmax = 250 kW

sweeps 500 μs + flat top 800 μs

slide5

RF conditioning of TTF3 power couplers

Results from the Warm Test Stand

H. Jenhani et al., NIM A 595 (2008)

slide6

Acceptance criteria for XFEL power couplers

XFEL input power coupler specifications

800 couplers to be delivered over 2 years

  • 8 couplers per week

Constrains on TOTAL CONDITIONING TIME

slide7

Acceptance criteria for XFEL power couplers

Conditioning : Infrastructure

clean room

(cl. 10 000 / iso 7)

mobile clean room (cl. 100 / iso 5)

stock

RF station

Managed by E. Genesseau (LAL)

slide8

Acceptance criteria for XFEL power couplers

Conditioning : Infrastructure

klystron

couplers conditioning bench

circulator

transfo

Managed by E. Genesseau (LAL)

slide9

Acceptance criteria for XFEL power couplers

Conditioning : Infrastructure

load (2 MW)

arc detector

load (5 MW)

pressure interlock

pressure window

pressurized wave guide WR650

wave guide WR650

hybrid coupler (3dB)

bellow

load (2 MW)

circulator

load (1 MW)

Managed by E. Genesseau (LAL)

slide10

Acceptance criteria for XFEL power couplers

Conditioning : lessons learned from TTF3 couplers

Cleaning & Assembly

  • Class 10 clean room
  • US bath cleaning with detergent + high temperature
  • Drying with filtered N2 and under laminar flux
  • Particle count
  • Leak test

Cleaning & assembly procedure @LAL

To be performed by the manufacturer !

Follow the procedure

M. Lacroix et al., LAL internal report

slide11

Acceptance criteria for XFEL power couplers

Conditioning : lessons learned from TTF3 couplers

Cleaning & Assembly

Conditioning of the Toshiba XFEL prototype pair @LAL

Conditioning times @DESY on the warm test stand

Time needed to achieve given power level

slide12

Acceptance criteria for XFEL power couplers

Conditioning : lessons learned from TTF3 couplers

In situ baking

Gas analysis

H. Jenhani et al., NIM A 595 (2008)

slide13

Acceptance criteria for XFEL power couplers

Conditioning : lessons learned from TTF3 couplers

Conditioning procedure

H. Jenhani et al., NIM A 595 (2008)

slide14

Acceptance criteria for XFEL power couplers

Accepting a coupler : good or excellent?

Example of refused coupler

  • Mechanical : dimensions, visual inspection
  • Material tests (TiN & Cu coatings)
  • Following the cleaning and assembly procedure
  • Particle count
  • Leak tests
  • In situ baking gas analysis
  • Time needed to achieve given power level
  • Total conditioning time => excellence
  • Number of interlocks => refusal
slide15

Acceptance criteria for XFEL power couplers

Accepting a coupler : XFEL prototypes

ACCEL – RI TOSHIBA

Arcing in WG transition

slide16

Acceptance criteria for XFEL power couplers

Acknowledgements

LAL-Orsay J.Bastide, T.Chabaud, A. Falou, T. Garvey, E.Genesseau, A.Gonnin, L.Grandsire, E.Herry, H.Jenhani, M.Lacroix, L.Leloup, P.Lepercq, B.Mercier, E. Mistrera, F. Letelier, M. Omeich, S. Prat, C.Prévost, Y.Peinaud, A.Thiebault & A. Variola

DESY-Hamburg S. Choroba, A. Gossel, O. Hensler, F.Hoffmann, V. Katalev, D. Kostin, A.Matheisen, W-D. Möller & C. Mueller

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