Difference between revisions of "PPB - Aug 4, 2021"

Latest revision as of 10:50, 4 August 2021

We will meet on Wed (UAS 9am, JLab 11am, IJCLab 5pm)
Bluejeans: https://bluejeans.com/405130883/4307
Code to start the meeting 4307

Mark's presentation
- schematic of layout
- fraction of e+/e- beam
- include e- (need Geant4 + standard GPT)

Why PAC proposals might fail?
- Arguments that reversing CEBAF dipole polarities is problematic or costly
- Arguments that e+ and e- beam energies cannot be within 5e-4 of one another
- Arguments for a cold start tune-up of CEBAF with low current (10 uA peak @ 60Hz: VL~6e-4 = 6nA ave, BPM~1.5e-2 = 150 nA)
- Arguments for realistic multi-pass acceptance

How do we coordinate our efforts?
- Mark develop start-to-end model
- Sami explore beam size/angle Geant4
- Andriy will work on target
- Ryan exploring FFA concept

Small meeting with Eric, Riad, Ryan and Mark
Bunch length needs to be confirmed, north linac fractional energy spread acceptance needs to be checked, emittance is a concern
possibility of FFA use given the wide energy/momentum spread
presentation with table values explained and simulations is being worked on

@@ Line 12: / Line 12: @@
 * Why PAC proposals might fail?
 ** Arguments that reversing CEBAF dipole polarities is problematic or costly
-** Arguments for a cold start tune-up of CEBAF with low current (duty factor typ. e- 10 uA pulse @ 60 Hz)
+** Arguments that e+ and e- beam energies cannot be within 5e-4 of one another
+** Arguments for a cold start tune-up of CEBAF with low current (10 uA peak @ 60Hz:  VL~6e-4 = 6nA ave, BPM~1.5e-2 = 150 nA)
 ** Arguments for realistic multi-pass acceptance
+* How do we coordinate our efforts?
+** Mark develop start-to-end model
+** Sami explore beam size/angle Geant4
+** Andriy will work on target
+** Ryan exploring FFA concept
 ==Jul 28th Agenda ==