1. BLM Meeting 10/18/2010 Drennan 1 Booster BLM Upgrade Specification Development September 2010 Craig Drennan

2. BLM Meeting 10/18/2010 Drennan 2 How Does It Work? BLM Digitizer Circuit Model

3. BLM Meeting 10/18/2010 Drennan 3 How Does It Work? More Details

4. BLM Meeting 10/18/2010 Drennan 4 View of the VME Module

5. BLM Meeting 10/18/2010 Drennan 5 What Does Data Look Like ? Data from early Booster tests

6. BLM Meeting 10/18/2010 Drennan 6 Data Processing on the VME Module The module performs the following data processing. 1. Digitizes the results of an analog 20.08 μs BLM charge integration into a 16 Bit Word. 2. Baseline subtraction is performed as soon as the 20.08 μs integrations are digitized. 3. Every 80.32 μs an average of 4 each 20.08 μs integrations produce a 16 Bit Word that is written to a FIFO memory.

7. BLM Meeting 10/18/2010 Drennan 7 Data Processing on the VME Module 4. 40.16 ms of data is collected at a rate of 12.45 kHz for each Booster cycle, resulting in 500 samples per cycle. 5. A conservative estimate for transferring one 16 Bit Word over VME is 1.0 μs. This leads to a total time of 12 ms to transfer one cycle of data for all 24 BLM channels, from the Digitizer modules to the MVME processor board. (500 samples / channel)*(1 accesses / sample)* (24 channels)*(1.0 μs / access) = 12 ms

8. BLM Meeting 10/18/2010 Drennan 8 Data Processing on the VME Module Initial Data Processing Producing 80 us Samples

9. BLM Meeting 10/18/2010 Drennan 9 Front-End Data Processing BLM Data Formats  The base 80 us integration samples. Base data for computing the other sums.  The full cycle sampled accumulation Data for Snap Shot plots. Used when tuning the Booster.

10. BLM Meeting 10/18/2010 Drennan 10 Front-End Data Processing BLM Data Formats (cont.)  The 1 ms integration samples Data delivered to the BLM data logging application BLMLOG Ref “Booster Loss Monitor Data Logging”, K. Cahill March 11, 2002.  The 100 second moving sums Used in Booster performance and BLM Alarms. Ref. http://www-ad.fnal.gov/proton/booster/blmshttp://www-ad.fnal.gov/proton/booster/blms  The 7.5 Hz Waveform Buffers IRM process for delivering time stamped data, synchronized across front-ends. Used by B:136 ? Ref. R. Goodwin,”BLM Correlated Data”, Nov. 1, 2002

11. BLM Meeting 10/18/2010 Drennan 11 Front-End Data Processing Illustration of the Front-End processing

12. BLM Meeting 10/18/2010 Drennan 12 Front-End Data Processing Illustration of processing continued

13. BLM Meeting 10/18/2010 Drennan 13 Front-End Data Processing QUESTIONS: What type of BLM summation is used by the following applications? Are there other applications I have missed that currently exist? Are there applications we may want that do not yet exist?  BLM2 Data Logger  App B88 – BLM / TRIP POINT BAR GRAPH DISPLAY  App B36 – BOOSTER BEAM LOSS NON-NORMALIZED BAR GRAPH DISPLAY  App B136 – BLM CYCLE PLOT MULTIPLE BLM TIME PLOTS, 87 CHANNELS ON A SPECIFIC EVENT

14. BLM Meeting 10/18/2010 Drennan 14 Snap Shot Plots Plotting  Needs to plot multiple Booster cycles.  Needs to approximate slower sampling rates  Needs to support Delay from Arm Event  Defining a new SNP Class ?

15. BLM Meeting 10/18/2010 Drennan 15 Snap Shot Plots Illustration of processing