1. Offline software - Introduction
L.Gatignon
EN-EA-LE/SBA retreat, 26 April 2017

2. The Stone Age of Computing (1) L.Gatignon, LE-SBA Retreat, 25-04-2017
Offline Software

3. The Stone Age of Computing (2) L.Gatignon, LE-SBA Retreat, 25-04-2017
Offline Software

4. The Stone Age of Computing (3) L.Gatignon, LE-SBA Retreat, 25-04-2017
Offline Software

5. Traditional main software in the group
Program
Pro’s
Cons
Beatch
Simple
Legacy data files
Barely accepted by AN-ACE-SU
No transverse information
No default integration with optics or tracking software
Transport
Based on transfer matrix
Simple to use
Well tested
Fit routine not the best
No graphical output (by default)
Decoupled from Beatch
Turtle-STD
Easy link to Transport
No particle production at all
Only RMS addition, no Xo’s
Barely used
Turtle-EBS
Can implement nr Xo
CERN-only
Particle production unreliable
Only circular angle input
HALO
Rather precise field maps
Well tested and validated
Good performance
Fast
Horrible input format
Horrible output format
Not very flexible Only muons, no h±, n, e, g,,..
L.Gatignon, LE-SBA Retreat,
Offline Software

6. Main auxiliary tools Program Pro’s Cons beamplt
Quick, almost automatic
Reads only transout file
Not to scale
beamopt1,2
Nice, to scale drawings
Time consuming
Need to adapt Beatch
currents
All magnets of a beam file
Random polarities
Only for NA beams
beamfiles
Output easy to export to Word, Excel, etc
Only for East Area beams
Need hand-made input file
bli
Relatively convenient
Rather precise
Only NA magnet parameterisation
blips
Strange parameterisation
Mostly for PS magnets BL to I not always converging
turt2hbook
halo2hbook
Good for PAW plots
Cut-off in scatter plots No selection of plots
L.Gatignon, LE-SBA Retreat,
Offline Software

7. Small utilities Command Function cuttr
Print only (last) Transport table
coptodbea
Copy from primary directory to ~eagroup/database Update/create web pages with beatch file links
copfrdbea
Copy from ~eagroup/database to private subdirectories
nrec
Count number of lines in a file
partprod
Particle production calculator (applet)
partratio
Table of partprod output for list of momenta
psprint
Print ps files from beamplt or beamopt
shuffle
Invert lines of a file (e.g transin file)
lxprintf
Print input files
lxprintl
Print output files decently
L.Gatignon, LE-SBA Retreat,
Offline Software

8. General remarks All based on old Fortran
No guaranteed long-term support
Knowledge slowly disappearing (both Fortran and software)
Not a modern look-and-feel
But…
Many years of experience and validation
Often much faster than modern software
Sometimes debugging is difficult (crashes, logfiles, lack of detailed tracing, etc)
L.Gatignon, LE-SBA Retreat,
Offline Software

9. How to proceed? New software (lots of work)
Wrappers around e.g. MADX for R-matrix approach
Any tool with GIUs & fits ‘à la Marcel’
Combination / integration with layout database, naming convention, etc
Who does what
L.Gatignon, LE-SBA Retreat,
Offline Software

10. Other programs for beam calculations
PATH (but based on Turtle)
MADX
PLACET
G4-Beamline
BDSIM
FLUKA …
L.Gatignon, LE-SBA Retreat,
Offline Software