Closedown

script/RFscan/GunScan.py

@@ -7,15 +7,17 @@ if get_exec_pars().source == CommandSource.ui:
     step    = 20.0
     nb      = 5
     lat     = 1.0
+    disp    = caget("SINBD01-DSCR010:DISPERSION-SIM")
+    energy0 = caget("SINBD01-DSCR010:ENERGY-SIM")
 else:
     start = args[0]
     stop  = args[1]
     step  = args[2]
     nb    = int(args[3])
     lat   = args[4]
+    disp    = args[5]
+    energy0 = args[6]
 
-disp    = caget("SINBD01-DSCR010:DISPERSION-SIM")
-energy0 = caget("SINBD01-DSCR010:ENERGY-SIM")
     
 phase =  ControlledVariable("Phase", "SINEG01-RSYS:SET-VSUM-PHASE", "SINEG01-RSYS:SET-VSUM-PHASE")
 phase.config.minValue   =-180.0
@@ -29,13 +31,11 @@ camtool.start("SINBD01-DSCR010")
 while camtool.stream.getChild("gr_x_fit_mean") == None:
     time.sleep(0.1)
 
-
 x  = camtool.stream.getChild("gr_x_fit_mean")
 dx  = camtool.stream.getChild("gr_x_fit_standard_deviation")
 
-
 try:
-    xb  = create_averager(x,  nb, -1)
+    xb  = create_averager(x,  nb, -1)    # -1 event based, waits for the next value
     dxb = create_averager(dx, nb, -1)
     dxb.monitored=True     # not blocking, will return last nb values
     r = lscan(phase, [xb, dxb], start, stop, step , latency=lat)
@@ -44,6 +44,7 @@ try:
     dE  = [energy0 * (val.mean / 1e6 / disp) for val in r.getReadable(1)]
 finally:
     phase.close()
+    camtool.stop()   # stops camtool but does not close it camtool is a global object
 
 p = plot(None, title="Output")[0]
 p.clear()
@@ -52,3 +53,5 @@ p.addSeries(LinePlotSeries("Energy spread"))
 p.getSeries(0).setData(to_array(rf_phase, 'd'), E)    
 p.getSeries(1).setData(to_array(rf_phase, 'd'), dE)    
 p.setLegendVisible(True)
+
+set_return([E,dE])