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CA.BHB 0400

Detailed update on beam line installation progress, alignment challenges, future plans, and collaboration. Includes activities, disassembly process, vacuum break, and close support needs. Describes gun and LIL1 disassembly, valve bakeout, RF gun cavity, and laser system updates. Mentions brazing tests, circular sliding waveguides, and high voltage modulator testing. Highlights the need for collaboration between CERN and CEA teams for successful project completion.

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CA.BHB 0400

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  1. ITL DUM 0450 ACS 0230 ACS 0250 ACS 0270 TBTS #1 – CTF3 Committee: CALIFES STATUS CA.FCU 0430 CA.MTV 0420 CA.MTV 0125 (virtual cathode) CA.MTV 0215 CA.MTV 0390 CA.BPR 0370 CA.ICT 0210 CA.BPM 0410 CA.SDH 0340 CA.BPM 0240 CA.BPM 0310 CA.BPM 0220 CA.BPM 0260 CA.BPM 0380 CA.DHG/DVG 0130 CA.DHB/DVB 0250 CA.DHG/DVG 0245 CA.DHG/DVG 0225 CA.DHG/DVG 0385 CA.DHB/DVB 0230 CA.DHG/DVG 0320 CA.DHB/DVB 0270 CA.DHG/DVG 0265 CA.QFD 0350 CA.BHB 0400 CA.SNG 0230 CA.QFD 0360 CA.SNG 0250 CA.QDD 0355 CA.SNH 0110 CA.SNI 0120 CA.VVS 0300 CA.VVS 0200 CA.VVS 0100 CA.VVS 0500

  2. Beam line installation (including laser transport line) and Alignment Electron beam • Intense activity since several months • Alignment is more difficult than expected: • Future plans: • Before week 20: vacuum break by CERN • Week 20 and 21: (CEA team at CERN) • - disassembly of elements between gun and LIL1 including BPM n°1 for realignment (errors found between CERN and CEA alignment data) • - disassembly of all BPM-DHG/DVG, MTV supports for alignment investigation • Objective: sealing and vacuum pumping of the whole linac end of w21 • →Need close support • - from CERN Vacuum group • - from CERN Alignment team during 15-16 and 19-21 May Gun LIL1 ICT 0210 MTV 0215

  3. Photo-injector Bakeout • The bakeout of the gun must include the RF waveguides and can include some elements after the valve if necessary MTV 0215 Valve VVS 0200 RF Gun cavity Attention: Temperature must be limited around MTV 0215

  4. Command-Control , BPM and Laser system Command/Control: Intense activity on C/C for the three next months particularly for BPM BPM: Electronic chassis installed in CLEX-G (see picture) Laser system: Energy per pulse two low → not possible to work on the pulse shaping Beam delivery from Laser room to CLEX-A laser table validated (transport under vacuum along 60 meters)

  5. Circular phase shifter Mode convertor: Brazing test on a scale one prototype succeeded → OK to start the two final convertors → scheduled for end of 2008 Circular sliding waveguides: → non conformity (turning) before brazing for few pieces → negotiations with supplier

  6. High Voltage Modulator Second step of the acceptance test with PPT High power load, bidirectional coupler, Low Level RF system including Peak Power meter and mixer to measure more precisely the voltage ripple and pulse-to-pulse stability (Jitter) Ripple = ±0.3% Jitter = ± 0.2% Before PFN tuning After PFN tuning (Measured at 270kV, 280A, 32MW, 3.3Hz at sat.) → Acceptable values for CALIFES Successful collaboration

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