Minutes of RESULTS, PITZ Physics Seminar, 04.04.2012

Project: PITZ
Participants: M. Krasilnikov, G.Vashchenko, I. Ivanisenko, K. Kusoljariyakul,  J. Li, M. Otevrel, M. Khojoyan, B. Marchetti, A. Oppelt, D. Kalantaryan, G. Kourkafas, R. Martin, D. Malyutin, M. Gross

Agenda:

1)	 G. Vashchenko: Emittance optimization for 100pC bunch charge and flat-top temporal laser profile

2)	M. Khojoyan:  Emittance optimization for 100pC bunch charge and Gaussian temporal laser profile
3)	M. Krasilnikov:  Simulation of the measured longitudinal momentum at PITZ-1.8 
4)	Y. Ivanisenko: Iris diaphragm and bunch length in simulations

Results:
1)	G. Vashchenko: Emittance optimization for 100pC bunch charge and flat-top temporal laser profile
- Laser temp. profile 2/22\2 ps
- Variables:
	- Laser RMS size
	- Gun gradient and phase
	- Solenoid current
	- Booster phase and gradient

- The higher BSA the higher Booster gradient leads to min. emittance (#1)

2)	M. Khojoyan: Emittance optimization for 100pC bunch charge and Gaussian temporal laser profile
- Temporal profile: 9-17ps FWHM
- For 0.17 rms spot-size: very small dependence on laser temp. length 

3)	M. Krasilnikov:  Simulation of the measured longitudinal momentum at PITZ-1.8 
- Results from LEDA similar to the “smooth” case, from HEDA to the SC-assisted case.

4)	Y. Ivanisenko: Iris diaphragm and bunch length in simulations:
- The emittance is not much dependent on the number of blades (The only exception is for the 3-blades case, but in this case ASTRA does not provide correct result because of SC effect homogenization ). 

Next steps:
What is to be done?	By whom?	Until when?	Done on	
Find out of the reason of point #1	G. V.			
Tolerance studies for the best points	G. V.			
Include laser-pulse-length as optimization parameter	G. V.			
The difference in emittance results should be investigated	G. V.			
Check for different booster gradients	M. Kh.			
Check the phase spaces for 0.114 and 0.164mm (together with the other profiles)	M. Kh.			
Try some charge cut	M. Kh.			
Implement the 2D density distribution plot on phase and momentum to new MAMA	M.O.			
The data presented by Mikhail can be the base for a separate paper. 	???			
Prepare the data for V-code crosscheck	Y. I.			
Consider demagnification of the BSA image on the VC2 to improve the situation with the BSA blades.	M. G., G.K.			

Protocol prepared by M.Otevrel, 04.04.2012