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Beamline Tools Overview for Tim Michalski Project Lead

This detailed overview provides insights into various equipment and safety measures in the Gep/G2p beamline, including diagnostics, upside-down girder, tungsten calorimeter, slow raster, and more. It covers technical specifications, safety protocols, and current status of equipment readiness for physics experiments.

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Beamline Tools Overview for Tim Michalski Project Lead

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  1. g2p/GEp Beamline Tim Michalski Project Lead

  2. Beamline Overview Diagnostics Girder (BPMs, Harp) Upside Down Girder (correctors, BCM, superharp) Slow Raster FZ2 Magnet Tungsten Calorimeter FZ1 Magnet IIC1D07 IIC1D0A DUMP • ION CHAMBERS Viewer

  3. Slow Raster • Technical • Signal generator control from Counting House • Up to 25mm diameter raster pattern – uniform energy distribution across target face • Safety • OSP modified from Hall C use • Masked for beam setup in straight thru configuration with Tune beam • Status • Verified during commissioning run • Ready for physics

  4. Tungsten Calorimeter • Technical • Repositioned from Long Girder in Hall A • Controller redesigned and rebuilt w/PC104, new control SW • Calibration demonstrates 1% accuracy in beam current measurement • Safety • No change from historical Hall A operation • Status • Verified during commissioning run • Ready for physics

  5. BCM w/ new 2-Channel Receiver • Technical • New 2 channel receiver electronics design – tailored for low current measurement • Standard BCMs • Safety • No change from historical Hall A operation • Status • Verified during commissioning run • Ready for physics

  6. BPM w/ new 4-Channel Receiver • Technical • New 4 channel receiver electronics design – tailored for low current measurement • M15 antenna style BPMs • Safety • No change from historical Hall A operation • Status • 3 units complete and tested - fully characterized and tested in electronics lab • 30 Hz and Beam Sync implemented • Finalizing SW by February 9 • Requires final installation and testing

  7. BPM w/ new 4-Channel Receiver • Technical • Required Input Parameters • Dynamic Range - Imin and Imax (50 nA < G2P < 150 nA) • Resolution/Accuracy - Determines SNR (G2P ~ 100 um) Based on physics and algorithm • Output Rate - Ultimate system BW and output sample rate (G2P = 2 kHz) • Isolation - Crosstalk and rejection of “systematics”

  8. BPM w/ new 4-Channel Receiver • Signal is Sensor-Specific 100um resolution requires SNR =34 dB. M15 will provide -102 dBm @ 50 nA

  9. BPM w/ new 4-Channel Receiver • Required Noise Floor = -136 dBm • Required Noise Fig. (BW=2kHz) = 5 dB • Actual receiver Noise Figure = 2-3 dB (based on gain setting) • M15 w/ Prototype Electronics, BW ~ 2000 Hz

  10. Superharp • Technical • 50 um wire • New fork design • New controller chassis – PC104 w/ new SW • Safety • No change from historical Hall A operation • Status • Tested during commissioning run • Trigger needs to be adjusted • Will test electronics and interface with an injected signal • Increased wire size and material • Ready for physics

  11. FZ Magnets and PSs • Technical • FZ1 – 325 A @ 40VDC (PS) • Requires AI magnet in series to achieve desirable load on PS • FZ2 – 500 A @ 40VDC (PS) • New vacuum chambers to contain beam path for all energy levels • Draws from hall LCW for cooling (magnets and PSs) • Safety • OSP approved and in hall • Hardware Interlocks on PS • Klixons on magnets • Beacons – interlocked to PS • Signage • Status • Full power test status – FZ1 tested complete, FZ2 PS failed component at 95% (repair and retest)

  12. FZ Magnets and PSs

  13. Chicane Control box removed when not being used.

  14. Chicane Diagnostics Girder 2 BPMs, 1 Superharp Viewer Girder

  15. Chicane • Technical • 2 FZ magnets, viewer, 2 BPMs, superharp • FZ2 magnet on vertically adjustable stand to accommodate all beam energies • FZ2 repositioning and alignment required at multiple times during physics run (viewer and diagnostics girder repositioning is also required) • Safety • OSP is approved and in hall • FZ2 stand controller is removable from the hall • Standard PPE • Status • Used for straight through operation during commissioning run • Design change in process to improve robustness of diagnostics girder mount (withstand loads due to vacuum) • No issues expected with final 2B alignment

  16. Safety Systems • Interlocks • Diffuser – water flow • Calorimeter • Compton Electron Detector • Radiator • Target Movement • Hydrogen Sniffer • UPS SW Crash • Lumi and Ion Chambers • BLM • Vacuum • FZ1 and FZ2 Magnets • Septum Magnet • Target Magnet • Fast Raster • H2 Sense • Water Flow • Differential Pressure • Supply Pressure • Supply Temperature

  17. Experimental Run Plan

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