Difference between revisions of "Absolute Beam Energy"

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==Summary of Beam Properties in JLab Injector==
+
= '''Summary of Beam Properties in JLab Injector''' =
  
  
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|-
 
|-
 
| '''Beam Kinetic Energy, T (MeV)'''
 
| '''Beam Kinetic Energy, T (MeV)'''
|  3.0 – '''7.75'''  
+
|  3.0 – '''9.0'''  
 
|-
 
|-
 
| '''Beam Current (µA)'''
 
| '''Beam Current (µA)'''
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|-
 
|-
 
| '''Energy Resolution (Spread), σ<sub>T</sub> /T'''
 
| '''Energy Resolution (Spread), σ<sub>T</sub> /T'''
|  0.06%  
+
|  0.2%  
 
|-
 
|-
 
| '''Beam Size, σ<sub>x,y</sub> (mm)'''
 
| '''Beam Size, σ<sub>x,y</sub> (mm)'''
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|}
 
|}
  
  Goals:
+
  Goal:
  - Increase beam kinetic energy to '''8.5 MeV'''.
 
 
   - Reduce the uncertainty on the absolute beam energy to '''<0.1%''' and achieve a relative beam energy of '''<0.02%'''.
 
   - Reduce the uncertainty on the absolute beam energy to '''<0.1%''' and achieve a relative beam energy of '''<0.02%'''.
  
  
  
==PEPPo Results==
+
= '''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]]
  
===Momentum Measurement:===
+
 
 +
 
 +
= '''Dipole Field'''=
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* ''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 summary of beam momentum: [[Media:130724_Bubble_Grames.pdf]]
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* Joe's followup: BPM quad centering [[Media:130726_MomentumFollowUp2_Grames.pdf]]
 
* Joe's followup: BPM quad centering [[Media:130726_MomentumFollowUp2_Grames.pdf]]
  
===Cryounit Gradient:===
+
==Cryounit Gradient:==
  
 
* ''Upper limit of the electron beam energy at the CEBAF 2D injector spectrometer and its functionality''
 
* ''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]]
 
Jonathan Dumas, Joe Grames, and Eric Voutier [[Media:JLAB-TN-08-086.pdf]]

Latest revision as of 08:52, 13 April 2018

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


Dipole Field


New Dipole Magnet

  1. Magnet Design: media:new_5MeV_dipole.pdf media:new_5MeV_dipole.doc
  2. Magnet Drawings (change txt to tar): media:05-06-14_ISSUED_DL_MAG_DRAWINGS.txt
  3. 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

  1. GMW DTM-151-PS Digital Teslameter, 20 Bit Resolution, RS-232 Interface, Panel Mtg media:G3_MAN_DTM-151-S.pdf
  2. 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:

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