2015 06 Visit to ATF2

Attending

  • Jochem
  • Laurie
  • Stewart (remote)

Setup

Log Book

BDSIM Development (fixes and improvements)

  • branched from develop v0.7-rc (release candidate)
  • offsets
  • histogram bug
  • fix overlapping volumes
  • cleaner bds acc. comp. base class
  • sbend vacuum bug
  • pybdsim/Root for root histo to matplotlib

TODO

  • working ATF2 model for v.5.2
  • detailed aperture list, more or less everything is 12 mm (radius)
  • set strengths automatically from set file
  • set offsets automatically from data file
  • separate strength file
  • access Sampler class in robdsim/pybdsim
  • provide wrapper for plotting root histograms in matplotlib
information:
  • beampipethickness
  • correct materials and geomtry for OTR, YAG
  • energy cut / particle cut for cherenkov detector ~ 1-2MeV
  • add reference cavity as drift
  • OTR screen info: a four set of new targets is installed, two of them made with 2 Ám aluminum and two with a 3 to 5 Ám Kapton with a 0.12 Ám Aluminum coating. Both materials are doing well with the current beam parameters. p.53 http://digital.csic.es/bitstream/10261/90424/1/457258.pdf
geometry improvements (in order of perceived importance):
  • cbpms - Scad/STL model done, needs to be imported to BDSIM
  • flanges (as drift)
  • quad outermagnet geometry (coils): 2 versions: tokin (FF), EXT model? (EXT)
  • tapered collimator
  • plates before quads (as drifts)
  • detector geometry, see ATF2BDSIMDetectors
others:
  • halo distribution
  • beam gas distribution

ROOT Wizardry

Plot from tree with limits

sampler = (TTree*)f.Get("Sampler_L207B")
TH1F f2 = TH1F("f2","f2", 100,-10000,10000)
sampler->Draw("y>>f2")
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Topic revision: r15 - 18 Jun 2015 - JsnuverinkSnuverink

 
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