Script execution

script/Alignment/Gun_solenoid_alignment.py

@@ -29,6 +29,7 @@ if get_context().source == CommandSource.ui:
 else:
     centroid_excursion_plot = False
 
+multiple_background = multiple_background and use_background   
 print "Parameters: ", I1, I2, dI, settling_time, plot_image, number_images, use_background, multiple_background, number_backgrounds 
 
 plot_name = datetime.datetime.fromtimestamp(time.time()).strftime('%H%M%S')
@@ -37,11 +38,10 @@ plot_name = datetime.datetime.fromtimestamp(time.time()).strftime('%H%M%S')
 add_device(CamTool("camtool") , True)
 camtool.setNumberOfImages(max(number_images,1))
 camtool.enableBackground (use_background)
-if use_background and not multiple_background:
+if use_background:    
     laser_off()
-    camtool.captureBackground(number_backgrounds)
-multiple_background = multiple_background and use_background   
-
+    if not multiple_background:
+        camtool.captureBackground(number_backgrounds)
 
 # Switch off magnets
 mag = [ "SINEG01-MCRX120","SINEG01-MCRY120",
@@ -59,13 +59,13 @@ if zero_solenoids:
 # add here gun phase setting see wiki page
 
 
-def br():    
+def before_sample():    
     if multiple_background:
         camtool.captureBackground(number_backgrounds)
         laser_on()            
     camtool.update()
     
-def ar():
+def after_sample():
     if multiple_background:
         laser_off()
     
@@ -78,7 +78,7 @@ try:
     sensors =  [camtool.com_x_mean, camtool.com_y_mean, camtool.com_x_stdev, camtool.com_y_stdev] 
     if plot_image:
         sensors.append(camtool.image)
-    r = lscan(gun_solenoid, sensors , I1, I2, dI, settling_time, before_read = br, after_read = ar)
+    r = lscan(gun_solenoid, sensors , I1, I2, dI, settling_time, before_read = before_sample, after_read = after_sample)
 finally:
     laser_off()
 
@@ -90,13 +90,13 @@ else:
     hx.append(hx[0]); hy.append(hy[0])        
 
 # save the entry in the logbook
+gsa_log_msg = "Data file: " + get_context().path
+gsa_log_msg = gsa_log_msg + "\n\n" + r.print()
+
 if do_elog:
-    msg = str(r)
-    msg = msg + "\nFile: " + get_context().path
-    msg = msg + "\n\n" + r.print()
-    elog("Gun solenoid current scan", msg , get_plot_snapshots())
+    elog("Gun solenoid current scan", gsa_log_msg , get_plot_snapshots())
 
-set_return([r, hx,hy])
+set_return([r, hx, hy])