Absolute Beam Energy

Summary of Beam Properties in JLab Injector

Beam Kinetic Energy, T (MeV)	3.0 – 7.75
Beam Current (µA)	0.01 – 100
Absolute Beam Energy	0.36%
Relative Beam Energy	0.1%
Energy Resolution (Spread), σT /T	0.06%
Beam Size, σx,y (mm)	1 – 2

Goals:
 - 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%.

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