Beam Setup and Measurement - May 2018

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

Go here /usr/opsdata/bubble/elegant/May2018/lattice.lte

Edit 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

Type command elegant energyspread.ele

Type command sddsprintout -col=ElementName -col=betax -col=etax energyspread.twi

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