1. HBD HV Control and Monitoring System STATUS UPDATE Manuel Proissl HBD Meeting 01/19/2009

2. CALIBRATION PROGRESS  The calibration of ALL 6 1471N Run9 modules has been completed successfully. None of the modules have unacceptable offsets!  Procedure for calibration used for all modules: The system ramps every channel up from 0 – 3kV in 50V increments with a timeout of 10.5s each, and from 3 – 4kV in 10V increments with a timeout of 10.5s each. The linear ramp up speed is set to 10V/s.  The detailed analysis of all key voltage for every module will be completed before Run9 Kick-off on Feb. 27 th We may decide to use correction tables at any time until then in order to achieve a precision of approx. 0.01% HBD HV Control & Monitoring System Manuel Proissl Page 2 of 5 Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: January 19 th, 2009

3. EN1 CALIBRATION RESULT HBD HV Control & Monitoring System Manuel Proissl Page 3 of 5 Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: January 19 th, 2009 EN1 is off by 0.42% 1471N EN1 output: 4016.87V instead 4kV New DV: 3983.13V

4. RESISTOR MEASUREMENTS  Every resistor on every divider installed on the HBD has been measured precisely! Procedure: “Take-out” resistors were taken out one by one, then board-mounted ones, measured in nS over a stable timeframe and recorded every 100ms. Average for every second has been plotted used for further calculations. HBD HV Control & Monitoring System Manuel Proissl Page 4 of 5 Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: January 19 th, 2009 Resistance IDSectorModuleSiemensMOhm 31T0ENEN15.03E-071.986512464 31T1ENEN11.92E-0852.07271145 31T2ENEN19.91E-0810.09435827 31T3ENEN15.06E-0819.74406345 31M0ENEN15.03E-071.986356872 31M1ENEN13.88E-0825.78634958 31M2ENEN19.98E-0810.02418857 31M3ENEN12.18E-0845.86207276 31B0ENEN15.04E-071.985621331 31B1ENEN19.79E-0810.20965828 31B2ENEN11.92E-0852.21890878 31B3ENEN15.08E-0819.70294732 31X0ENEN1M4.99E-072.00477713 31X2ENEN1M9.67E-0810.34644642 31X3ENEN1M9.91E-0810.08595397 31T1 31T2 31T3 31M1 31M2 31M3 31B1 31B2 31B3 31T0 31M0 31B0 31X0 31X231X3 EN1

5. STATUS / UPCOMING  Based on discussion from last week’s meeting, the database structure has been changed accordingly and their corresponding data objects. It allows now to generate custom ramp up tables for every module and individual mesh voltages. Now the system needs to be tested before hooking up the actual detector, which will be done and tested extensively this week.  Since Friday, all 6 1471N Run9 modules have been installed again on the bridge and ALL SHV cables and Trip Detector cables have been hooked up to the mainframe in their final Run9 configuration. Please see spreadsheet (email) for the config information.  Today all cables will be hooked up to the Relay Boards and a low voltage channel test run on the board outputs will be performed.  Furthermore we’ll check if the mainframe (ON) but channels disabled and hooked up to the detector influences the noise on the readout. HBD HV Control & Monitoring System Manuel Proissl Page 5 of 5 Upgrades For Run9 | PHENIX, BNL HBD HV Control System HBD Meeting :: January 19 th, 2009