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Message ID: 1144     Entry time: Thu Oct 30 07:21:22 2025
 Author: Entered by Marie Jacquet from 134.158.205.9 on Thu Oct 30 07:21:05 2025 
 Status: Under Process 
 Type: Shift summary 
 Category: LI | TL | LE | Ring 
 Important:
 Subject: Programme shift (X-rays spectres vs atte & phases) 
 Icon:  

08h17 Warm-up ThomX: Modulator, Laser, Fridge

08h24 Chillers were started, cycling all magnets

09h18 HV is ON

09h21 HV 1215 V

The receipt recipe_recipe_LI_TL_RI_all_20251023_12_06_10.txt was loaded, linac phases, section attenuator and steerers were adjusted

10h10 RF Gun phase 202 dg., Sect Phase 206 dg., Sect. Att. 2.57 dB, Linac steerers: H [0.61 -2.91], V [-2.63 3.21], Laser Att. 274, Charges (BPMs): -94 -94 -97 -97 pC TL/BPM02 X = -1 mm

10h20 Beam in the ring. RF cavity 100 kV, phase 6.5 dg. 

the receipt saved: recipe_recipe_LI_TL_RI_good_20251030_10_50_55.txt

The good receipt saved to references 50MeV_last....

17h10 Stop ThomX

Shift Program

  • Start the Archivage OK

  • Align 50 MeV beam in QP1 QP3 with Kevin script

  • TL_bpm2 : adjust espread and put beam at x=0

  • Store the beam in the ring with an orbit as flat as possible around the IP

  • Make a vertical FPC scan - Then put the table at maximum OK

  • Align the CdTe spectro on the on-axis position, approximatively by eyes with the Photonic science camera ==> take a spectrum OK

  • Change gun phase only  OK

in positive direction   ==> take a spectrum
return to "nominal"      ==> spectrum
in negative direction ==> spectrum
return to "nominal"      ==> spectrum
  • Change section attenuator only ==> idem (positive, "nominal", negative, "nominal") ==> 4 spectra  OK

  • Change the section phase only ==> idem ==> 4 spectra  OK

To not be affected too much by the motor hysteresis and by the boucle d'eau, "nominal" means that the beam has to return to its previous X position on TL_bpm2

ELOG V3.1.4-395e101