February 2012 9mA Studies

Name: February 2012 9mA Studies
Start: 2012-02-21T07:00:00+01:00
End: 2012-02-27T07:00:00+01:00
Location: Universe

21 Feb 2012, 07:00 → 27 Feb 2012, 07:00 Europe/Zurich

Universe

Description

DESIRED MACHINE CONDITIONS * Long bunch trains (600us or more) * 3MHz bunch rep rate, range of bunch charges up to 2nC/bunch * Range of gradients on ACC67 up to cavity quench limits OVERALL GOALS * Study beam operation at maximum achievable gradients on ACC67 with light beam loading * Study setting up flat gradients on all cavities in ACC67 with heavy beam loading (continuation of ‘Pk/Q’l’ study) * Eventually: Operate as close as possible to gradient limits on ACC67 with heavy beam loading * Klystron saturation studies with heavy beam loading The nominal program for each shift is included in the notes for each shift. These will be updated as needed

Tuesday 21 February ¶
- 1
  
  Morning (Maintenance)¶
  
  Switch laser to 3MHz Switch machine operating rate to 5MHz
  
  Notes from daily coordination meeting
- 2
  
  Afternoon¶
  
  TPS validation Machine setup for long bunch trains at 3MHz and 5Hz Energy: 1GeV
- 3
  
  Night¶
  
  Machine tuning: aim for ≥1nC/bunch at 3MHz, 600us bunch trains
Wednesday 22 February ¶
- 4
  
  Morning¶
  
  Beam loading compensation setup Piezo tuner setup Measurements of ACC67 quench limits
  
  Notes from daily coordination meeting
- 5
  
  Afternoon¶
  
  Pk/Ql studies at ≥3mA
  
  Pk/Ql shift summary
- 6
  
  Night¶
  
  1. Continue Pk/Ql studies at 3mA/600us as needed 2. Injector matching for 2nC bunches, starting around 04:00 3. Parasitically, perform initial gradient limit measurements
Thursday 23 February ¶
- 7
  
  Morning¶
  
  1. Once injector matching is completed at 2nC, begin transporting 2nC bunches and long bunch trains to the end of the linac 2. Return to high gradient studies: measure gradient limits without beam, then measure with light beam loading
  
  Quench shift summary
- 8
  
  Afternoon¶
  
  Preparation for Klystron saturation / RF power overhead studies Pk/QL studies at ≥4mA
- 9
  
  Night¶
  
  Machine tuning: aim for 2nC/bunch @ 3MHz, 600us bunch trains
Friday 24 February ¶
- 10
  
  Morning¶
  
  Test procedures for performing gradient scans (+/- few %) with 6mA and 600us bunch trains
  
  Pk/Ql shift summary
- 11
  
  Afternoon¶
  
  High gradient studies with light beam loading
  
  Quench shift summary
- 12
  
  Night¶
  
  Pk/Ql studies at 6mA and long bunch trains Set up for 8hr stable run with gradients close to quench and moderate beam loading
Saturday 25 February ¶
- 13
  
  Morning¶
  
  8hr stable run with high gradients and beam loading
- 14
  
  Afternoon¶
  
  High gradient studies Set up for RF power overhead studies
- 15
  
  Night¶
  
  RF power overhead studies
  
  document
  
  Near kly. saturation
Sunday 26 February ¶
- 16
  
  Morning¶
  
  Set up high gradient studies with heavy beam loading High gradient studies with heavy beam loading
- 17
  
  Afternoon¶
  
  High gradient studies with heavy beam loading
- 18
  
  Night¶
  
  High gradient studies with heavy beam loading