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CALIFES STATUS

CA.MTV 0125 (virtual cathode). CA.MTV 0420. CA.FCU 0430. CA.MTV 0215. CA.MTV 0390. CA.BPR 0370. ITL. CA.BPM 0260. CA.BPM 0380. CA.BPM 0220. CA.ICT 0210. CA.BPM 0310. CA.BPM 0240. CA.SDH 0340. CA.BPM 0410. DUMP 0450. ACS 0230. ACS 0250. ACS 0270. TBTS. CA.DHG/DVG 0130.

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CALIFES STATUS

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  1. CA.MTV 0125 (virtual cathode) CA.MTV 0420 CA.FCU 0430 CA.MTV 0215 CA.MTV 0390 CA.BPR 0370 ITL CA.BPM 0260 CA.BPM 0380 CA.BPM 0220 CA.ICT 0210 CA.BPM 0310 CA.BPM 0240 CA.SDH 0340 CA.BPM 0410 DUMP 0450 ACS 0230 ACS 0250 ACS 0270 TBTS 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 CALIFES STATUS #2-CTF3 Committee

  2. CALIFES STATUS: Mechanics/Alignment • Work planned on week 20 • Alignment of the linac: vacuum break (CERN), disassembly of all components BPM-DHG/DVG, MTV supports, belows for alignment investigations (CEA+CERN) • Work planned on week 21 • Alignment of the linac: re-alignment of some components if necessary (CEA), new set of measurements (CERN), displacement of the last CA.MTV0390 chamber of ~15 mm towards the wall (no more margin for tuning is possible with its present location), linac under vacuum again • Laser table: additional holds for our laser table to install in laser room • Cabling: - connections of CA.DHB/DVB0230 to finish (CERN) • - connectors block for connection to be installed on • CA.DHG/DVG0225-0245-0265-0320-0385 as for -0130- #2-CTF3 Committee

  3. CALIFES STATUS: Mechanics/Alignment • Work planned on week 21/22 • Diagnostics components: CA.MTV0215-0390-0420 • Additional protections, holds for camera, CCD boxes to install (+cabling) • Laser / RF Gun: installation of the mirror in the laser chamber near the RF Gun • Work planned on week 25 • BPM: measurement of the frequencies and Q factor of monopole and dipole modes on CA.BPM0220-0240-0260-0310-0380-0410 + attenuations in cables (can start on week 21) #2-CTF3 Committee

  4. CALIFES STATUS: Laser system Program of week 17: - Measurement of the profile of the beam out of the BBO : the distorted profile is mainly due to the high walk-off (85 mrad) combined with the low diameter (~130 µm FWHP) of the green beam focused on the BBO. - Change of the diameter on KTP and BBO for selecting the best configuration with the actual state of the laser. The criteria to consider for that optimisation are still unclear since maximizing the energy should lead to bad profile (walk off on BBO) and possible unexpected energy in between the 6 ps pulses - Checking the procedure for safety in the transport (various mounting of components, 3 lens afocal on PI optic table, 3 lens afocal on laser tables…, checking New Focus components) The conditions on the BBO and energy were nearly the same as on previous measurements in March: E=28 nJ and Eff 1.047-> 262 = 1% (= eff 1.047-> 523 (=18%) * eff 523-> 262 (=5%) ) Pictures of the beam at the output of the BBO (quadrupling) #2-CTF3 Committee

  5. CALIFES STATUS: Laser system Program of week 21: - Finalize the configuration to be installed in order to get approximately 4mm diameter on the photocathode (with HeNe laser beam), - Work on the virtual cathode adjustment Program for week 23: - Change the (decentered) lens necessary for the transport “under the roof” - Finalize the transportation of the laser beam with alignment laser Program for week 25: - Mounting and adjustment of the beam on the laser table - Finalize the UV beam configuration - Installation of the pulse picker  later #2-CTF3 Committee

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