1. Observations of Beam Filamentation at SLM5F02 in Simulation July 22, 2011 C. Tennant

2. Procedure PARMELA model of gun – Drive laser parameters based on measurements, assumes ideal distribution – 350 keV DC photocathode gun – Bunch charge of 135 pC, push 300K particles PARMELA model of merger – Use Excel (no space charge) to set quads for match to linac – Tweak quads to improve match in PARMELA (with space charge) PARMELA model of the linac (acceleration) – Accelerate 10° before crest – Space charge effects still appreciable in first module, use Excel to set transverse match in the triplets (where space charge is small) elegant model of the recirculator – include 1D CSR model and implement “csrdrifts” (allows CSR wake to propagate beyond dipole) – Run to middle of second  -bend  SLM5F02

3. Recall: Beam-based Measurements (view in Slideshow mode to view animated GIF)

4.  t,wiggler = 418.7 fs under-compressed

5.  t,wiggler = 343.7 fs under-compressed

6.  t,wiggler = 269.2 fs under-compressed

7.  t,wiggler = 195.5 fs under-compressed

8.  t,wiggler = 126.0 fs under-compressed

9.  t,wiggler = 73.9 fs fully compressed

10.  t,wiggler = 83.0 fs over-compressed

11.  t,wiggler = 142.2 fs over-compressed

12.  t,wiggler = 213.6 fs over-compressed

13.  t,wiggler = 288.3 fs over-compressed

14.  t,wiggler = 364.6 fs over-compressed

15. Energy and  t vs QT2F08/9 Strength over-compressed under-compressed