10.76 RAMPRF—A voltage-, phase-, and/or frequency-ramped RF cavity, implemented like RFCA.

A voltage-, phase-, and/or frequency-ramped RF cavity, implemented like RFCA.
Parallel capable? : yes
GPU capable? : no
Back-tracking capable? : no






Parameter Name UnitsType Default

Description






L M double 0.0

length






VOLT V double 0.0

nominal voltage






PHASE DEGdouble 0.0

nominal phase






FREQ Hz double 500000000

nominal frequency






PHASE_REFERENCE long 0

phase reference number (to link with other time-dependent elements)






VOLT_WAVEFORM STRINGNULL

<filename>=<x>+<y> form specification of input file giving voltage waveform factor vs time






PHASE_WAVEFORM STRINGNULL

<filename>=<x>+<y> form specification of input file giving phase offset vs time (requires FREQ_WAVEFORM)






FREQ_WAVEFORM STRINGNULL

<filename>=<x>+<y> form specification of input file giving frequencyfactor vs time (requires PHASE_WAVEFORM)






FIDUCIAL STRINGNULL

mode for determining fiducial arrival time (light, tmean, first, pmaximum)






GROUP string NULL

Optionally used to assign an element to a group, with a user-defined name. Group names will appear in the parameter output file in the column ElementGroup






Explanation of <filename>=<x>+<y> format: Several elements in elegant make use of data from external files to provide input waveforms. The external files are SDDS files, which may have many columns. In order to provide a convenient way to specify both the filename and the columns to use, we frequently employ <filename>=<x>+<y> format for the parameter value. For example, if the parameter value is waveform.sdds=t+A, then it means that columns t and A will be taken from file waveform.sdds. The first column is always the independent variable (e.g., time, position, or frequency), while the second column is the dependent quantity.

RBEN