1. 1 HBD Update Bill and Ted’s Excellent Adventure T.K. Hemmick for the Wyld Stallions

2. 2 Status West Excellent water and oxygen, Dude! East 3 lpm2 lpm Will use 5 lpm during run

3. 3 Scintillation used to get Gain Fit to Gaussian + Exponential. Gain from: –Use ADC gain from manual (pC/channel) –2000 e’s/mV from pre-Amp –Checks with 55 Fe to ~10%

4. 4 Gains Normalized for P/T Using the curve above we can deduce the normalization factor to determine the gain at P/T = 2.560 This was different from running conditions: –Bill = 2.596 –Ted = 2.606 This is within expected range of operation.

5. 5 Bill S. Preston, esq.

6. 6 Ted Theodore Logan

7. 7 Cosmic Studies We believe that the starting points for operation in PHENIX are now well enough defined that we’re ready for Run-9. Excellent!!!

8. 8 P/T Corrections: We will have to track P/T variations carefully. In the past month, the extremes of P/T would change the HBD gain by a factor of 1.98. Auto-adjustment scheme under consideration: –Finite set(s) of conditions. –Change voltages between runs. P/T=2.525 P/T=2.627

9. 9 INSTALLATION IN PHENIX  December 8 th, 2008 – 4PM EST :: HBD HV Control & Monitoring System successfully installed in PHENIX Due to the HBD Simulation Project, the installation process without big complications!  TS5 has been powered up and connected to the HBD mainframe on the bridge.  The mainframe rack which is shared with the RXNP guys, has been powered up.  ALL 6 Run9-modified 1471Ns, which have been crash tested and prepared for installation since last Thursday continuously day & night, were installed in the 1458HP mainframe.  ALL 40 channels (GEMs & Mesh chn) have been ramped up and measured via Fluke by controlling them one by one through the HV Control System, which was run on a laptop connected to the PHENIX wireless. The installation channel check procedure automatically ramped & disabled channel by channel after measurement. The channel check has been completely successful!!! Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: December 9 th, 2008 HBD HV Control & Monitoring System Manuel Proissl Page 3 of 6

10. 10 INSTALLATION IN PHENIX Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: December 9 th, 2008 Channel Check on the Bridge View onto the HBD from HV Bridge HBD HV Control & Monitoring System Manuel Proissl Page 4 of 6

11. 11 Cube Measurements Some bogus news. Apparently the microdot connector inside Ted is damaged. Despite this trouble, Bob sees peaks both for scintillation and 55 Fe from the measurements. Cube will still make measurement, just not as clean.

12. 12 Job List Cabling –Excellent Progress –Done Monday Apply Voltage: –Use CF 4 for real test –Use NIM module (CAEN) Current-limiting mode. New HV system still testing. –Few days starting early next week. –Vlad-in-charge. Finish commissioning of new HV system.