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g2p/GEp Beamline

g2p/GEp Beamline. Tim Michalski Project Lead. 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. Slow Raster. Technical

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g2p/GEp Beamline

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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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