Friday 11/5 08:00 RF communication problem solved. Ready to inject but beam not available from the injectors. Injection line collimators opened from 4.5.

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Presentation transcript:

Friday 11/5 08:00 RF communication problem solved. Ready to inject but beam not available from the injectors. Injection line collimators opened from 4.5 to 5 sigmas 10:40-11:40 Access required for RF: The problem with the RF functions observed last night is understood (and cured). While searching for the Cav8B2 problem yesterday, we have replaced a VME module, installing a spare  whose firmware was NOT UPDATED. That PCB should NOT have been in UX45. The problem with cfv-ux45-acsc8b2t CPU crash is not understood yet. We have replaced the Tuner module

Friday 11/5 12:30 Injecting. Higher bunch intensity ~1.34x1011 p/b Warning levels (up to 50 %) on TCSG/TCLA/MQWA.A6.R7.B2 at the end of the ramp and during the squeeze + UFINO

Chirp Increased the gain of the damper by factor 2 during the squeeze for next fill

Friday 11/5 14:04 STABLE BEAMS #2616. 1.25x1011 p/bunch. 4.3x1033 cm-2s-1. 15:57 Failure of a 24V power supply for vacuum control crate in point 7. Vacuum valves closed, Beam dump. End of fill #2616

Friday 11/5 17:00 -20:30. Access: Vacuum control crate repair Temperature gauge on current lead (Q10.R2)  filter installed. Being monitored. Could be a bad contact. World FIP repeater in Sector 78 affecting QPS for main circuits. Connector with a short to ground.

Injection slowed down by frequent SPS extraction with longer bunches (expert called in the night to optimize longitudinal properties) Ramp and squeeze OK. Warning level (~30 %) reached only at b*=1.5 m otherwise no issues 23:20 STABLE BEAMS #2617. 1.23x1011 p/bunch. 4.1x1033 cm-2s-1.

23:40 Trip of Sector 12: Q7. R1 (1st) and Q9 23:40 Trip of Sector 12: Q7.R1 (1st) and Q9.L2 (2nd) – Quench heaters fired – SEU? Quench?) during optimization of point 1 and 5. No sign of instability from BBQ and no losses in the area. 00:30 OK from MP3 to restart the circuits

01:16 Temperature of RB dump resistor OK but problem with orbit corrector RCBCV9.L5B1 (120 A) requiring access for repair 03:30 Access finished – pre-cycle 04:30 – 07:00 Losses at injection on beam 2. Finally traced back to different super-cycle in the SPS Still warning levels close to 50 % reached between 2.5 and 2 m Smoking screen in CCC!! Collisions

Plan Crossing fingers!!!