84 lines
2.6 KiB
Python
84 lines
2.6 KiB
Python
import ch.psi.pshell.epics.Positioner as Positioner
|
|
|
|
USE_SCREEN_PANEL = False
|
|
|
|
start = 85.0
|
|
stop = 90.0
|
|
step = 0.5
|
|
nb = 3
|
|
lat = 0.1
|
|
disp = -0.387
|
|
p0 = 7.1
|
|
plt = plot(None, title="Output")[0]
|
|
thr = 500
|
|
|
|
A = p0 / disp / 1e6
|
|
B = p0
|
|
|
|
#Plot setup
|
|
plt.clear()
|
|
plt.removeMarker(None)
|
|
plt.setStyle(plt.Style.ErrorY)
|
|
plt.addSeries(LinePlotErrorSeries("Momentum", Color.red))
|
|
plt.addSeries(LinePlotErrorSeries("Momentum Spread", Color.yellow, 2))
|
|
plt.getAxis(plt.AxisId.X).setLabel("Gun Beam Phase (deg)")
|
|
plt.getAxis(plt.AxisId.Y).setLabel("Momentum (MeV/c)")
|
|
plt.getAxis(plt.AxisId.Y2).setLabel("Momentum Spread (MeV/c)")
|
|
plt.setLegendVisible(True)
|
|
|
|
|
|
phase = DummyPositioner("Gun Phase")
|
|
camera_name = "simulation"
|
|
|
|
phase.config.minValue = -90.0
|
|
phase.config.maxValue = 360.0
|
|
phase.config.precision = 4
|
|
phase.config.resolution = 0.5
|
|
phase.config.rotation = True
|
|
phase.config.save()
|
|
phase.initialize()
|
|
phase0 = phase.read() % 360
|
|
|
|
#Camera setup
|
|
if USE_SCREEN_PANEL:
|
|
cam_server.start(camera_name+"_sp1", True) # shared pipeline
|
|
else:
|
|
cam_server.start(camera_name) # generic pipeline
|
|
wait_cam_server_message()
|
|
x = cam_server.stream.getChild("x_center_of_mass")
|
|
dx = cam_server.stream.getChild("x_rms")
|
|
cam_server.setThreshold(thr)
|
|
cam_server.setBackgroundSubtraction(False)
|
|
|
|
#Creating averagers
|
|
x_averager = create_averager(x, nb, -1) # -1 event based, waits for the next value
|
|
dx_averager = create_averager(dx, nb, -1)
|
|
dx_averager.monitored = True # not blocking, will return last nb values
|
|
|
|
#Record callback: uptate of output plot
|
|
def after_sample(record, scan):
|
|
global A, B, plt
|
|
x_pos_mean, x_pos_stdev = record[0].mean, record[0].stdev
|
|
x_width_mean, x_width_stdev = record[1].mean, record[1].stdev
|
|
p_mean, p_stdev = A * x_pos_mean + B, abs(A) * x_pos_stdev
|
|
dp_mean, dp_stdev = abs(A) * x_width_mean, abs(A) * x_width_stdev
|
|
phase = ((record.positions[0] + 90) % 360) - 90 if start < 0 else record.positions[0]
|
|
plt.getSeries(0).appendData(phase, p_mean, p_stdev)
|
|
plt.getSeries(1).appendData(phase, dp_mean, dp_stdev)
|
|
|
|
#The scan loop
|
|
try:
|
|
phase.write(start)
|
|
time.sleep(1.0)
|
|
r = lscan(phase, [x_averager, dx_averager], start, stop, step , latency=lat, after_read = after_sample)
|
|
finally:
|
|
phase.write(phase0)
|
|
phase.close()
|
|
cam_server.stop() # stops cam_server but does not close it cam_server is a global object
|
|
|
|
ph = r.getPositions(0)
|
|
if start < 0:
|
|
ph = [((val + 90) % 360) -90 for val in ph ]
|
|
p = [A * val.mean + B for val in r.getReadable(0)]
|
|
dp = [abs(A) * val.mean for val in r.getReadable(1)]
|