Calculate normalized emittance, twiss parameters, and bmag from quad scan or multi-wire/screen scan

[phys-cgarnier]

Look at possibility moving bmag and twiss from Williams BMAD model to a more general location.

[nneveu]

Emittance gist: https://gist.github.com/thduong2/591c67f82d95e7cfffd41f4c397ef201

[nneveu]

@shamin-slac @phys-cgarnier There is simple quad scan code in the emittance gist, see below. There is already a scan function in the magnet class. The beam size function would be replaced w/ Chris' code.

# create some scan: quad between -6 and 0
scan_settings = [
  {"QE04": -6},  # step 1
  {"QE04": -3},  # step 2
  {"QE04": 0},  # step 3
]

# start scan, we call the 'acquire_images' function after each step
magnets.scan(scan_settings=scan_settings, function=acquire_images)
beam_sizes = get_beamsize(image_file = image_file_locations) #x_rms, y_rms, x_stdz, y_stdz

[nneveu]

@phys-cgarnier , please @ Alex in after this comment and add her as assignee on the issue (I don't know her github name). I think for the bmag and twiss parts of this, she can do the following:

• start a new file under beam or data_analysis. Maybe it can be a transverse.py file instead of folder in beam.
• If you go with data_analysis, please rename the folder to data (I've been meaning to do this).
• Start with copying the bmag and twiss functions exactly as they are from William's code.
• Meet with him to add doc strings and comments that would help a new user.
• Then work on making them into a general beam calculation object (use Pydantic).
• Think about how the user will call the functions, i.e. : beam.transverse.twiss or data.transverse.twiss
• You don't have to use those ^ names exactly, write it how it make sense to you. Thanks in advance! Feel free to add questions to this thread as needed.

[aikuma14]

My username is aikuma14, can I be added as an assignee?