Beam Setup and Measurement - May 2018
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Energy Setup and Measurement
Emittance Measurement
- Setup beam to FC2
- Use qsUtility configuration files to scan MQJ0L02 and/or MQJ0L02A and uses harp IHA0L03
- Be sure to enter the correct momentum in the configuration and/or analysis files
- Elegant optics lattice begins at MQJ0L02 (that is, use or propagate optics to that location)
Energy Spread Measurement
- Setup beam to 2D spectrometer dump
- Upstream quads MQJ0L02 and MQJ0L02A can be any value but must be recorded
- Use HarpFitterTool to scan IHA2D00 to measure horizontal beam size
- Use Elegant to calculate the horizontal beta (betax) and the horizontal dispersion (etax) at the harp location
- Update lattice file /usr/opsdata/bubble/elegant/May2018/lattice.lte
- K1 values for MQJ0L02/MQJ0L02A
- Update energy spread elegant file
- Go here /usr/opsdata/bubble/elegant/May2018/energy_spread
- Edit energyspread.ele
- Update p_central_mev
- Update beta_x and beta_y with qsUtility values at MQJ0L02
- Update emit_nx and emit_ny with qsUtility values at MQJ0L02
- Run elegant
- Go here /usr/opsdata/bubble/elegant/May2018/energy_spread
- Update lattice file /usr/opsdata/bubble/elegant/May2018/lattice.lte
Optics Setup
- Chris Tennant's Elegant Model from September 2015 installed for reference:
- /usr/opsdata/bubble/elegant/Sep2015
- Elegant Model files updated for May 2018:
- /usr/opsdata/bubble/elegant/May2018
- Lattice file definition of beam lines and defaults:
- /usr/opsdata/bubble/elegant/May2018/lattice