def distance(x = None):
'''Read or set the detector distance'''
ts = DeviceProxy('i11-ma-cx1/dt/dtc_ccd.1-mt_ts')
if x == None:
return ts.position
ts.position = x
def detectorPosition(x = None):
'''Read or set the detector position'''
ts = DeviceProxy('i11-ma-cx1/dt/dtc_ccd.1-mt_ts')
tx = DeviceProxy('i11-ma-cx1/dt/dtc_ccd.1-mt_tx')
tz = DeviceProxy('i11-ma-cx1/dt/dtc_ccd.1-mt_tz')
if x == None:
return ts.position, tx.position, tz.position
ts.position, tx.position, tz.position = x
def resolution(x = None):
'''Read or set the resolution'''
ts = DeviceProxy('i11-ma-cx1/dt/dtc_ccd.1-mt_ts')
diameter = 315. # detector diameter in mm
radius = diameter / 2.
distance = ts.position
wavelen = wavelength()
if x == None:
theta = math.atan(radius / distance)
resolution = 0.5 * wavelen / math.sin(theta / 2.)
return resolution
theta = math.asin(wavelen / 2. / x)
distance = radius / math.tan(2. * theta)
ts.position = distance
