Definitions of Twiss parameters

[homma]

Hi, I would like to confirm the definitions of Twiss parameters in the elegant manual. In relevant textbooks, the Twiss parameters are conventionally defined with alpha, beta, and gamma. Is the eta parameter in the elegant manual corresponding to the conventional gamma ? Could someone point me to the proper references on which the Twiss parameters of the elegant manual are based.

[michael_borland]

beta and alpha are the usual twiss parameters. eta is the dispersion function. Elegant doesn't output gamma. You can create it yourself using sddsprocess:

Code: Select all

% sddsprocess run.twi -define=column,gamma%s,"alpha%s sqr 1 + beta%s /",units=1/m,select=beta?,edit=4d

--Michael