1. Python Applications for beamline control/analysis Tim Mooney
ca_util.py – thin layer above CaChannel
plot.py – display 1D of a scan
readMDA.py – read MDA file format
detView.py – display images from 2D scan

2. ca_util.py Automatic dictionary: PV name : CaChannel object
caget(PVname)
caput(PVname, value)
caputw(PVname, value)
camonitor(PVname, python function, user args)
caunmonitor(PVname)

3. plot.py

4. readMDA.py from readMDA import *
d = readMDA(filename, max_dimension, verbose, help)
returns a list:
d[0] – dictionary of scan-environment variables (mostly PV names)
e.g., d[0][‘2idd:mca1.R2LO’] = (‘ROI_2_LEFT:’,’’,[342])
d[n>0] one dimension of the scan, with the following fields:
time date & time at which scan was started
scan_name - name of scan record that acquired this dimension
curr_pt number of data points actually acquired
npts number of data points requested
nd number of detectors for this scan dimension
d[] list of detector-data structures
np number of positioners for this scan dimension
p[] list of positioner-data structures
nt number of detector triggers for this scan dimension
t[] list of trigger-info structures

5. readMDA.py
each detector-data structure (e.g., d[1].d[0]) has the following fields:
desc description of this detector
data data list
unit engineering units associated with this detector
fieldName - scan-record field (e.g., 'D01')
each positioner-data structure (e.g., d[1].p[0]) has the following fields:
desc description of this positioner
data data list
step_mode scan mode (e.g., Linear, Table, On-The-Fly)
unit engineering units associated with this positioner
fieldName scan-record field (e.g., 'P1')
name name of EPICS PV (e.g., 'xxx:m1.VAL')
readback_desc - description of this positioner
readback_unit - engineering units associated with this positioner
readback_name - name of EPICS PV (e.g., 'xxx:m1.VAL')

6. detView.py Requires numeric.py from readMDA import *
from detView import *
d=readMDA(“2idd_0004.mda”)
detView(d[2].d[0:15],scale=(2,2),columns=5)