7h45: mise en chauffe en remote (frigo/chillers, laser, modulateur, cyclage)
8h46 The photocathode laser image on the camera is very weak, I can't initiate feedback. Help needed.
08h56 HV is on
During another attempt to launch laser position feedback, the diaphragm completely disappeared outside the screen (to the right).
OK it was fixed
09h57 beam is in the ring w/o RF, recipe_recipe_LI_TL_RI_good_20260318_16_17_14.txt loaded. Laser phase 5 dg. (to low), sect. att. 0.148 dB, sect. phase 258 dg., Charges around -100 pC,
10h06 RF 100 kV, phase -45 dg.
10h30 interlocks even at sect. att. 0244 dB
11h15 Sect. temp. set to 29.2C (Clarinette, Consigne 28.6 C)
11h57 laser phase jumped to 18 dg.
12h25 For the 70 MeV settings (DP current 255.8 A) the linac energy is too low, so we left 253.8 A ==> 69.7 MeV.
18h10 ThomX was stopped
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7h30 : mise en chauffe en remote (frigo/chillers, modulateur, laser, cyclage)
9h00 HV is ON
10h33 Energy = 50 MeV, Laser Phase 77 dg., Sect. Phase 217 dg., Sect. Att. 2.546 dB, I_Gun -98.9021 pC, I_Linac -131.1291 pC, I_TL -120.2702 pC RF_Ampl. 148.7161 kV, RF_Phase -36.5 dg.
12h53 Energy = 50 MeV, Laser Phase 78 dg., Sect. Phase 218 dg., Sect. Att. 2.577 dB, I_Gun -97.6327 pC, I_Linac -124.7496 pC, I_TL -111.3515 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg. receipt 10 Apr last, X flux 35e3 pA, Las. Att. 276
14h56 Energy = 50 MeV, Laser Phase 75 dg., Sect. Phase 215 dg., Sect. Att. 2.53 dB, I_Gun -94.9526 pC, I_Linac -122.0817 pC, I_TL -108.2541 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg. sometimes it was 50e3 pA, Las. Att. 276
19h08 Energy = 50 MeV, Laser Phase 75 dg., Sect. Phase 212 dg., Sect. Att. 2.551 dB, I_Gun -350.6393 pC, I_Linac -372.038 pC, I_TL -364.2529 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg. Las. Att. 375
19h10 Energy = 50 MeV, Laser Phase 75 dg., Sect. Phase 212 dg., Sect. Att. 2.551 dB, I_Gun -368.8974 pC, I_Linac -390.9133 pC, I_TL -382.9227 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg. Las. Att. 415
20h44 Energy = 50 MeV, Laser Phase 74 dg., Sect. Phase 215 dg., Sect. Att. 2.605 dB, I_Gun -87.9133 pC, I_Linac -113.5951 pC, I_TL -101.2012 pC RF_Ampl. 148.7161 kV, RF_Phase -36 dg. Las. Att. 280
20h52 Thomx was stopped |
08h32 Warm-up ThomX: Modulator, Laser, Fridge
08h37 Chillers were started, cycling all magnets
09h48 HV is ON
10h42 There was a problem with "Camera Laser". Restarted li/op/las.02 server by killing it
12h26 Beam is in the ring, RF 100 kV, phase -42 dg. Laser phase 163 dg. Sect att. 2.57 dB, Sect. phase 221 dg. Laser att. 324, Charge oscillating around -120 pC. Feedback laser PID coefficients were changed: P=0.5,I=0.02, D=0.05 to get more stable laser spot position (Old: P=0.7,I=0.01, D=0.1 ).
18h27 ThomX was stopped |
08h25 Warm-up ThomX: Modulator, Laser, Fridge
08h33 Chillers were started, cycling all magnets.
09h31 HV is on. Vacuum: Li/Vac1 4e-9, Li/Vac2 3e-9, Li/Vac3 3e-9, Li/Vac4 1e-9
09h33 Sect. Att. 30 dB, RF Gun Att. 20 dB, HV 1030 V Interlock
09h39 Sect. Att. 30 dB, RF Gun Att. 20 dB, HV 1050 V Interlock. Something wrong
10h20 HV 1050 V. Maher is here. Interlock by reflected power to the klystron.
10h26 Modulator is on standby.
10h29 HV is on W/O RF. HV 1215 V. All is OK.
10h34 Modulator is on standby.
10h57 HV is on, 1030 V
11h09 HV is 1050 V
11h35 50pps, 1030V
11h42 1040 V interlock
11h45 Modulator is on standby.
16h10 Stop ThomX
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- Pour les atténuateurs : les butées ont été trouvées, ATT02-MOT01 c'est la canon, ATT01-MOT01 c'est la section.
- Des difficultés ont été rencontrés avec le modulateur : Interlock à cause de l'eau, interlock alim HT, reboot modulateur et vérification de l'autorisation de tir MPS faite.
Le modulateur fonctionne maintenant sans problèmes à une tension de 1240V et un vide klystron de 1.2 uA qui devrait diminuer par la suite. Les mesures radioprotection ont été faites
- Pour le MPS, cliquez sur Paramètres en bas de l'écran principal puis vérifier que LINAC est on.
Pour demain :
- Démarrer régulation eau en plus du modulateur
- Vérifier les signaux RFs sur oscillo et Réglage des retards (demarrage_delays)
- Ne pas mettre beaucoup de puissance, vérifier la chaine RF et vérifier les atténuateurs
- Vérifier caméra et ICT |