Absolute Beam Energy
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Summary of Beam Properties in JLab Injector
| Beam Kinetic Energy, T (MeV) | 3.0 – 9.0 |
| Beam Current (µA) | 0.01 – 100 |
| Absolute Beam Energy | 0.36% |
| Relative Beam Energy | 0.1% |
| Energy Resolution (Spread), σT /T | 0.2% |
| Beam Size, σx,y (mm) | 1 – 2 |
Goal: - Reduce the uncertainty on the absolute beam energy to <0.1% and achieve a relative beam energy of <0.02%.
Mott Results
- J. Grames, "Mott Experiment Run I/II Beam Energies" JLAB-TN-17-001 (Jan 17, 2017) media:JLAB-TN-17-001.docx media:JLAB-TN-17-001.pdf
Dipole Field
- MDL0L02 Dipole and Environmental Fields, August 16, 2016: media:MDL_Environmental_Fields.pdf media:MDL_Environmental_Fields.pptx
- MDL0L02 Dipole Hysteresis Loop Study, September 20, 2016: media:MDL_HysLoopMap.pdf media:MDL_HysLoopMap.pptx
- New Field Map: media:FinalNewMDL0L02_fm.txt
New Dipole Magnet
- Magnet Design: media:new_5MeV_dipole.pdf media:new_5MeV_dipole.doc
- Magnet Drawings (change txt to tar): media:05-06-14_ISSUED_DL_MAG_DRAWINGS.txt
- A detailed examination of the MDL field map and the TOSCA model of this "5 MeV" dipole
Jay Benesch (JLab Tech note 15-017, September 9, 2015): media:TN-15-017_MDL_FieldMap.pdf media:Graphs_MDL.pdf media:Graphs_MDL.docx
New Hall Probe
- GMW DTM-151-PS Digital Teslameter, 20 Bit Resolution, RS-232 Interface, Panel Mtg media:G3_MAN_DTM-151-S.pdf
- GMW MPT-231-8s Miniature Hall Probe with thermal sensor, High Sensitivity 0.03T, 0.06T, 0.12T, & 0.3T, 8m shielded cable. 0.01% accuracy, resolution to 2 ppm, and a temperature stability of 10 ppm/°C.
PEPPo Results
Momentum Measurement:
- Joe's summary of beam momentum: Media:130724_Bubble_Grames.pdf
- Joe's presentation at PEPPo Collaboration Meeting: Media:Collab_Momentum_Grames.pdf
- Joe's followup: Media:130718_FollowUp_Momentum_Grames.pdf
- Joe's followup: BPM quad centering Media:130726_MomentumFollowUp2_Grames.pdf
Cryounit Gradient:
- Upper limit of the electron beam energy at the CEBAF 2D injector spectrometer and its functionality
Jonathan Dumas, Joe Grames, and Eric Voutier Media:JLAB-TN-08-086.pdf