[BTeam] Beam Studies Campaigns for Spring2015

[Arne Freyberger]

Preparing for the Spring 2015 run, the set of prioritized beam study 
campaigns  is presented below.    Priority is based on  preparing for a 
12GeV run in the fall, improved CEBAF uptime and IPAC2015.

I've assigned names.   If you have been assigned a measurement, please 
start developing ATLis's for the measurement in question and submit them 
so that these tasks can be scheduled.   Most of these measurements 
(tasks 1,2,3) can be made with tune-mode beam and should be completed 
before we transition to 750MHz separation (the first two weeks of beam 
operation).

*All measurements shall be reported with error bars representing the 
best estimate for a one sigma error.*

Arne


    1 Spring 2015 Beam Studies Campaigns

<2015-02-05 Thu 07:22>


      1.1 Beam transverse emittance evolution

Who
    Todd, Roblin, Grames, Kazimi, Tief 

 1. 10.5 GeV setup
    Location 		ε_x 	ε_y 	β_x 	β_y 	α_x 	α_y 	MSL 	elogs
    5Mev 	Design 							Must 	
    Grames 	Measured 								
    End of Injector 	Design 							Must 	
    Kazimi 	Measured 								
    1E or 2E 	Design 							Should 	
    Tief 	Measured 								
    Hall-B 1-pass 	Design 							Must 	
    Tief 	Measured 								
    3E or 4E 	Design 							Must 	
    Todd 	Measured 								
    5E or 6E 	Design 							Should 	
    Todd 	Measured 								
    7E 	Design 							Must 	
    Yves 	Measured 								
    9E 	Design 							Must 	
    Todd 	Measured 								
    Hall-A 5-pass 	Design 							Must 	
    Yves 	Measured 								
    Hall-D 	Design 							Must 	
    Todd 	Measured 								


      1.2 Beam longitudinal evolution

 1. Bunch length
     1. Phasing Techniques

        Who
            Poelker, Ahmad, Tief 

         1. No Compression

            All locations are at Must level

            Location 	Who 	Measured 	Design 	technique 	elogs
            		σ_l 	σ_l 		
            kev 	Poelker 			Chopper scan 	
            5MeV 	Ahmad 			Back phasing into spectrometer 	
            Inj. Chicane 	Ahmad 			Inj. SLM 	
            Arc1 	Ahmad 			Arc1 SLM 	
            Arc2 	Ahmad 			Arc2 SLM 	

         2. Optimized Compression

            All locations are at Must level

            Location 	Who 	Measured 	Design 	technique 	elogs
            		σ_l 	σ_l 		
            kev 	Poelker 			Chopper Scan 	
            5MeV 	Ahmad 			Back phasing into spectrometer 	
            Inj. Chicane 	Ahmad 			Inj. SLM 	
            Arc1 	Ahmad 			Arc1 SLM 	
            Arc2 	Ahmad 			Arc2 SLM 	

     2. Real Time Interferometer

        Who
            Ahmad, Gubeli, Krafft, Freyberger 
        (no term)
            Determine if this device is viable or not. 
        (no term)
            High current to BSY dump on first pass. 
        (no term)
            Scan, integrate, try everything. 
        (no term)
            Draw conclusion about why it does or does not work. 

 2. Energy Spread

    Who
        Poelker, Grames, Kazimi, Freyberger 

    Location 	Who 	Measured 	Design 	Measured 	Design 	technique 	elogs
    		\frac{dp}{p} 	\frac{dp}{p} 	σ_E 	σ_E 		
    kev 	Poelker 						
    5MeV 	Grames 					5MeV spec 	
    107MeV 	Kazimi 					Inj. Spec. 	
    Inj. Chicane 	Freyberger 					INJ SLM 	
    Arc1 	Freyberger 					Arc1 SLM 	
    Arc2 	Freyberger 					Arc2 SLM 	
    Hall-A (5-pass) 	Freyberger 					IHA1C12 	


      1.3 Beam based data for model development

Who
    Yves, Todd and model team 
(no term)
    collect LOCO/ray-trace in all the S/Arc/R sections for determination
    of body gradients and other model information 

Location 	Data collected 	Body gradients 	Comment 	elogs
Arc1 				
Arc2 				
Arc3 				
Arc4 				
Arc5 				
Arc6 				
Arc7 				
Arc8 				
Arc9 				
ArcA 				
1C 				
2C 				
5C 				


      1.4 Push CW current to ASE limit in Hall-A

Who
    Yves, Spata 
(no term)
    Probe 5-pass setup to its limits. 
(no term)
    Document limitations 
(no term)
    Identify corrective actions that need to be applied during the
    Summer2015 SAD. 


      1.5 Reproducible CEBAF

Who
    TBD 
(no term)
    Cycle Mag/RF does beam reproduce? If not, why not? 
(no term)
    Some of this data will be gather parasitically with unplanned accesses 


      1.6 Scalable CEBAF

Who
    Yves 
(no term)
    What are the model vs design trends as a function of time and CEBAF
    energy for the CEBAF setup. 


-- 
Arne Freyberger
Director of Accelerator Operations
Jefferson Lab
12000 Jefferson Avenue      Cell: (757) 876-6289
Postal Suite 19             Email:  freyberg at jlab.org
Newport News, VA 23606

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