09h00 Warm-up ThomX: Modulator, Laser, Fridge

09h05 Chillers were started, cycling all magnets

10h03 HV is on

10h08 The laser att. 300 ==> 274 to set the gun charge to -100 pC 

10h53 beam is in the ring. Laser phase 101 dg., Sect.  Att. 2.533 dB, sect. phase 223 dg. (mot. pos. 1710. 223-60 dg. mot. pos. 1254 )

11h34 Breakdowns in the gun. Low SF6 pressure (2.2 bar)

13h38 Jean-Noel fixed it

13h48 HV is on

14h41 Gun charge is very ubstable and low. Breakdowns in the gun.

15h06 RF gun att. 3 dB

15h10 RF gun att. 2 dB

15h13 RF gun att. 1.5 dB

15h16 RF gun att. 1 dB. Can't move on. 

15h19 Shutter was closed

15h24 RF gun att. 0.8 dB

15h28 RF gun att. 0.4 dB

15h29 RF gun att. 0.2 dB, breakdowns, go back to 2 dB

15h51 50 pps 2 dB

16h02 It gets worse 

16h03 12.5 pps.

16h25 RF gun att. 0.5 dB

17h00 RF gun att. 0.8 dB

17h53 RF gun att. 0.0 dB, pulse width 2 us, breakdowns

17h58 RF gun att. 0.0 dB, pulse width 2.7 us, dark current 30 mV, solenoid off

18h00 RF gun att. 0.0 dB, pulse width 3 us, dark current 30 mV (it used to be around 18)

18h17 The laser spot on the cathode, the solenoid on, charge is low. There are breakdows at the new spot position.

18h20 ThomX was stopped