track momentum aperture+calculation of Touschek lifetime

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pjchou
Posts: 5
Joined: 25 Jun 2008, 08:15
Location: Taiwan Light Source(NSRRC)

track momentum aperture+calculation of Touschek lifetime

Post by pjchou » 25 Jul 2008, 02:38

This is an example on how to track momentum aperture in a storage ring, then calculate the Touschek lifetime. An elliptical beam pipe of 68 mm*30 mm is assumed in the lattice file. The procedure was set up with help from Michael. Thanks a lot :D

Ping
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The shell script 'plotMomAperture' generates the plot of momentum aperture from the SDDS file "%s.mmap". The magnet layout is provided by the file "%s.mag". For TPS storage ring lattice, it takes about 4 hours to track the momentum aperture on ASUS W5 notebook PC.
***{ description of files}***
79h2Twiss.lte= input lattice used by the 'elegant' input file
79h2MomAperture3.ele= input file for 'elegant', sync radiation included.
plotMomAperture= script file for plotting momentum aperture
tpsTouschek= script file for the calculation of Touschek lifetime by using the SDDS output from tracking of momentum aperture.
Attachments
plotMomAperture.txt
script file to plot momentum aperture
(398 Bytes) Downloaded 5605 times
79h2MomAperture3.ele
input file for elegant, sync rad. included
(945 Bytes) Downloaded 5596 times
79h2Twiss.lte
lattice file for storage ring, elliptical beam pipe is assumed for the whole ring
(3.64 KiB) Downloaded 5517 times

michael_borland
Posts: 1772
Joined: 19 May 2008, 09:33
Location: Argonne National Laboratory
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Re: track momentum aperture+calculation of Touschek lifetime

Post by michael_borland » 25 Jul 2008, 13:01

Ping,

Thanks for posting the example.

I recommend using the attach lattice file instead of the one you posted. It has synchrotron radiation (classical only, no ISR) enabled, which gives more reliable determination of the momentum aperture.

--Michael
Attachments
79h2Twiss.lte
(3.79 KiB) Downloaded 5601 times

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