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Package Lusi
This package and namespace gives access to some feature-extracted parameters for IPIMB and YAG.
Namespace Pds::Lusi
LCLS Ultrafast Science Instruments
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enum { Version = 1 }
enum { NRANGES = 3 } // 3 ranges by the charge amplifier (1pC, 100pc and 10nC)
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Public Member Functions
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// Constructors and Destructor DiodeFexConfigV1 () ~DiodeFexConfigV1 () DiodeFexConfigV1 (float _base[], float _scale[]) |
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class DiodeFexV1
Interface to feature extraction extracted parameters from each of the diodes used by the Intensity-Position Monitor.
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DiodeFexConfigV1 diode [NCHANNELS] float xscale float yscale |
class IpmFexV1
Feature extraction interface for the LUSI In-situ Intensity-Position MonitorsThis class defines some derived quantities from the IPIMB (LUSI Pop-in Intensity Position Intensity Monitor Board). Signal is read from 4 diodes on the board which surrounds the beam line. The signal from each diode is proportional to the beam intensity and the beam position in x and y is obtained from the relative difference in intensity measured by the left-right and top-bottom diodes.
Public Types
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Version = 1 enum { Version = 1 } |
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float channel [4] // background-subtracted output voltage from each of the four channels (diodes) float sum // sum of all channels[] float xpos // X-ray beam position in x (constructed from difference in intensity seen by left-right diodes) float ypos // X-ray beam position in y (constructed from difference in intensity seen by top-bottom diodes) |
class PimImageConfigV1
Configuration information for the LUSI Pop-in Profile Monitors: YAG crystals used in the vacuum path of the FEL converts x-rays into visible light. Video cameras with zoom lenses are used to image the beam profile screens.
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