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Linac and 400 MeV BPMs

Linac and 400 MeV BPMs. January 7, 2011. Linac. 400 MeV and Dump Lines. 400 MeV Line. Booster Injection. Linac Beam Position Monitors. Beam position calibration needs improvement. There is no online calibration for the current Linac BPM RF Modules.

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Linac and 400 MeV BPMs

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  1. Linac and 400 MeV BPMs January 7, 2011

  2. Linac Linac and 400 MeV BPMs

  3. 400 MeV and Dump Lines Linac and 400 MeV BPMs

  4. 400 MeV Line Linac and 400 MeV BPMs

  5. Booster Injection Linac and 400 MeV BPMs

  6. Linac Beam Position Monitors • Beam position calibration needs improvement. • There is no online calibration for the current Linac BPM RF Modules. • It is important that the new BPM electronics be linear with beam intensity in order for steering programs to work properly. • Desired position resolution of • +/- 0.25mm • NTF ‘s calibration needs should be considered in any upgrade. Linac and 400 MeV BPMs

  7. Linac and 400 MeV BPM Specifications Linac and 400 MeV BPMs

  8. Linac and 400 MeV BPM Data Acquisition* Initial Proposal * 1. Data acquisition of the beam position and intensity begins after an operator adjustable delay from the selected TCLK event. 2. One intensity and two positions (horizontal and vertical) are reported for each BPM at a 15 Hz rate. 3. Intensities and positions are averages of a settable number of samples over the beam pulse. 4. A settable offset, given as a number of samples into the data, determines which samples are not used in the averages. Linac and 400 MeV BPMs

  9. Linac and 400 MeV BPM Data Acquisition (cont.) 5. Delivery of every position sample for two operator selected BPM positions could be delivered at a 15 Hz rate. (600 samples = 10E6 sample/sec * 60E-6 sec) 6. One beam pulse average phase measurement from each BPM location delivered at 15 Hz. 7. Delivery of every phase sample for two operator selected BPM locations could be delivered at a 15 Hz rate. Linac and 400 MeV BPMs

  10. Specific 400 MeV BPM Data Acquisition Requirements 8. First Sample synchronous to the 400 MeV Chopper. A detailed document for the Chopper / BPM timing is provided in Beams-doc-3696-v1 in the Accelerator Division docDB document database. ----------- A detailed document capturing the requirement details is in the works. Contributions to this document are appreciated. ----------- Let me know the details you want to see written down and agreed on. Linac and 400 MeV BPMs

  11. The End Linac and 400 MeV BPMs

  12. Daily Linac Beam Position Monitors RF Module: Linac Low Energy, Dwg # EE-60820, R.C. Webber 1987 Linac High Energy, Dwg # ED-281074, J. Arthur 1993 Digitizer and DAQ: 20 MHz Digitizers tied into Linac front-end VME crates Linac-Booster Beam Diagnostics

  13. Linac Beam Position Monitors • New electronics are like MTA BPMs. • Prototype installation expected in Spring 2011. • Linac BPM Electronics Upgrade. • Linac BPM positions • Low Energy Linac, 14 • High Energy Linac, 80 (19 not currently connected) • 400MeV plus 200 MHz Booster Injection, 51 Linac-Booster Beam Diagnostics

  14. Daily 400MeV Beam Position Monitors 400 MeV BPM electronics will be upgraded with the Linac BPM’s. RF Module: Dwg # ED-281074, J. Arthur 1993 Digitizer and DAQ: Omnibyte, 5 MHz, “Comet” VME Beams-doc-3013-v2, S. Lackey 2008 For Description of gating see Beams-doc-3696-v1, C.C. Drennan 2010 Linac-Booster Beam Diagnostics

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