AN 26 16 00 Access finished problem with

A/N 26 ● 16: 00 Access finished ● problem with the BLM test. one crate is failing the beam permit test. Fixed. ● Access required in sector 78 for QPS to fix a quench heater supply. ● 17: 50 Machine closed. ● tried to ramp RB. A 78 to injection. but tripped at the start of the ramp. ● 18: 20 Arm BETS beam 1 & beam 2 with RB. A 45. RB. A 56. RB. A 67 & RB. A 78 at 450 Ge. V successful ● Precycle 12 23 34 45 56 67 81 1

A/N 26 ● 78 81 at injection current. ● trying to arm the BIC. – Problem to reset the B 1 excursion interlock from YASP. so decided to mask it to go-on. Lars informed and will investigate tomorrow. – Problem with the BLM in point 5 and 6 solved. managed to get the beam permit from BLM. – TCDQ not in injection position. so we mask also. The same for collimators. – All vacuum valves in the ring opened. – manually. problem with the handling of the command sent from the sequencer to the PVSS. . . looks like we need to check the RBAC access maps. Will contact Vac controls group tomorrow morning [Alick] ● 19: 50 manage to arm Beam 1 loop. but not beam 2. 2

A/N 25 ● ● ● ● PLI 3. b 3 performed on RQF/RQD. A 81 - all the threshold of symmetric quench detectors increased. - ramp to 2 k. A redone on RB. A 78 with EE at the plateau to check - PCS done on RCBXh 1. R 2 - RCBXH 3. L 5 tripped again - RU. R 4. manual ramp to 200 A with 0. 0025 A/s 2 worked. BIS problem. – – Despite all systems are given User_Permit=True. not possible to close the B loop for beam-2. loop A for beam-2 and both loops for beam-1 are all OK. An access in point 6 will be necessary for further investigation. 3

Night 26 ● Starting manual pyramid RB 78 ● QPS problem on RSF 2. A 78 B 2 RQTFA 12 B 2 Switch failure ● Pre-cycle from sequence 12 23 34 45 56 67 8 – Few load function problem (see log) – PC’s tripped: – RCBH 23. R 6 B 2 RQT 12. L 5 B 1 RQ 7 L 2 B 1 B 2 Safe Machine Parameters System 4

Night 26 ● 1: 52 Lost patrol in point 6 ● YCP 504 U 5650 ● Bic access signal undefined than False. Safe Machine Parameters System 5

Night 26 ● Sector 78 precycle ● QF tripped ● Sector 81 preparing for pyramid ● Sectors 12 23 34 45 56 67 81 – Ramp to nominal. OK Safe Machine Parameters System 6

summary ● As agreed with Ruediger and MP 3. PGC tests on hold as long as the dipoles are limited to 2 k. A ● Precycle done for all sectors. the related beam process is still in the 3. 5 Te. V Hypercycle. . ● some circuits did not load the functions. see logbook for the lists. ● Ramp to 1. 18 Te. V done for all sectors but 78. tripped during pre-cycle ramp down. initiated by RQF. ● RB. A 78. reduced pyramid to 2 k. A done. ● RCBXH 1. R 2 done. ok ● Sector 81 was brought to minimum current after the ramp at 1. 18 Te. V in order to start the pyramid at 5 k. A for RQF-D. It tripped when going from on standby to off. Subsequently. the main quadrupoles were tripping with no clear reason. likely QPS. . and therefore the pyramid was not started ● RU. R 4 tripped when running the sequence with the new parameters. 7

26 th - plans ● Access and patrol – Point 6 BIS, LBDS QPS ● ● ● IF 81 is ready to power pyramid 12: 00 machine closed BIS and LBDS test QPS tests (ramp 78 81) Pre-cycle all sector Safe Machine Parameters System 8