Log entry time 08:02:28 on April 23, 2004

Entry number 118956

Leader:   R. Michaels T/RICH:   B. Moffit Worker:   J. Singh Summary After the Right HRS Dipole recovered, steady data taking at 97µA. 2 RICH HV trips and 1 reboot of CODA ROCs 12 and 16. Alarm Handler on hacsbc2 would periodically flash red... but then disappear. Jaideep may have tracked it down to HV Alarms for the Pion Rejector in the Left Arm (absent). Significant Events 00:00 Began the shift with the Right Dipole ramping up. 01:10 Mark and Todd leave. 01:20 Right dipole begins to stabilize. Ask MCC for 5µA for Harp scan. Aspect ratio looks okay. See halog entries 118898 and 118899. 01:32 Asked MCC for 100µA. Energy spread from SLI sits less than 3x10-5 30ppm (118906). 01:36 Began Run 2642-Production Run. 02:08 Began Run 2643-Production Run. 02:20 Asked MCC to insert the 1C12 OTR to check energy spread. Looks good. See halog entry 118908. The OTR removed after the check. 02:35 Began Run 2644-Production Run. 03:02 Began Run 2645-Production Run. 03:29 Began Run 2646-Production Run. 03:57 Began Run 2647-Production Run. 04:07 Alarm for RICH HV trip. Alarms and HV reset. Halog entry 118920. 04:11 Began Run 2648-Production Run. 04:41 Attempted to begin Run 2649, but ROCs 12 and 16 did not respond. They were rebooted. See halog entry 118924. 04:47 Began Run 2650-Production Run. 05:19 Began Run 2651-Production Run. 05:37 Alarm for RICH HV trip. Alarms and HV reset. Halog entry 118928. 05:42 Began Run 2652-Production Run. 06:11 Began Run 2653-Production Run. 06:52 Asked MCC to insert the 1C12 OTR to check energy spread. Looks good. See halog entry 118940. The OTR removed after the check. 06:53 Began Run 2654-Production Run. 07:21 Began Run 2655-Production Run. 07:50 MCC: Problem with a vacuum pump. Will call if beam will be away longer than another 15 minutes. Runs Taken Run 2642 - Production Run (12C) Run 2643 - Production Run (12C) Run 2644 - Production Run (12C) Run 2645 - Production Run (12C) Run 2646 - Production Run (12C) Run 2647 - Production Run (12C). RICH tripped at the end. Run 2648 - Production Run (12C) Run 2649 - Junk Run 2650 - Production Run (12C) Run 2651 - Production Run (12C) RICH tripped at the end. Run 2652 - Production Run (12C) Run 2653 - Production Run (12C) Run 2654 - Production Run (12C) Run 2655 - Production Run (12C)