Closedown

script/Alignment/Laser_gun_alignment.py

@@ -1,37 +1,57 @@
-#Tool to align the laser on the cathode.
+# Tool to align the laser on the cathode.
 # S. Bettoni, A. Gobbo, D. Voulot
-#10/05/2016
+# 06/06/2016
 
-from operator import sub
+# Procedure:
+    # switch off all the magnets between the gun solenoid and the screen or BPM used for the measurement
+    # change the phase of the gun RF
+    # look at the centroid position (BPM or screen) downstream of the gun.
 
+phi_set = Channel("SINEG01-RSYS:SET-BEAM-PHASE")
+phi_get = Channel("SINEG01-RSYS:GET-BEAM-PHASE")
+# cam_x, cam_y = ...       # some camtool command / channel?
+bpm_x = Channel("SINEG01-DBPM340:X1")
+bpm_y = Channel("SINEG01-DBPM340:Y1")
 
-#Procedure:
-    #I switch off all the magnets between the gun solenoid and the screen or BPM used for the measurement
-    #I change the current of the gun soleoid
-    #I look at the centroid position (BPM or screen) downstream of the gun.
-    
-#TO BE PUT THE SIGNAL I-READ IN THE DEVICE DEFINITION GUN SOLENOID
+def ccr(mag):
+    n = 1
+    while n > 0:
+        sleep(0.5)
+        n = caget(mag + ":I-COMP")
+def laser_on():
+    caput("SIN-CVME-TIMAST-TMA:LaserDelayControl", 0)
+def laser_off():
+    caput("SIN-CVME-TIMAST-TMA:LaserDelayControl", 1)
 
-#caput("shutter:state", Closed)
+phi1 = 20.0
+phi2 = 150.0
+dphi = 1.0
 
-start_I = 0.001 #20
-end_I = 0.005 #150
-step_I = 0.001 #1
+# Switch off magnets
+mag = [ "SINEG01-MCRX120","SINEG01-MCRY120",
+        "SINEG01-MQUA140",
+        "SINEG01-MQUA150",
+        "SINEG01-MCRX160","SINEG01-MCRY160",
+        "SINEG01-MCRX180","SINEG01-MCRY180",
+        "SINEG01-MCRX200","SINEG01-MCRY200",
+        "SINEG01-MCRX220","SINEG01-MCRY220",
+        "SINEG01-MQUA310",
+        "SINEG01-MQUA320" ]
+for m in mag:
+    caput(m + ":I-SET", 0.0)
+for m in mag:
+    ccr(m)
 
-#Scan using the screen
-r = lscan(gun_sol_current, [center_x, center_y], start_I, end_I, step_I, latency = 0.2)
-#Scan using the BPM
-#r = lscan(gun_sol_current, bpm_1_down_gun, start_I, end_I, step_I, latency = 0.2)
+# Scan using the screen
+#r = lscan(phi_set, [phi_get, cam_x, cam_y], phi1, phi2, dphi, 0.5)
+# Scan using the BPM
+r = lscan(phi_set, [phi_get, bpm_x, bpm_y], phi1, phi2, dphi, 0.5, before_read = laser_on(), after_read = laser_off())
 
-#I take the result of the scan and I do the plots
-x = r.getReadable(0)
-y = r.getReadable(1)
-p = plot(y, xdata=x, title = "CM")
-yerr = 0.1
-xerr = 0.5
+# take the result of the scan and do the plots
+plot(r.getReadable(2), xdata=r.getReadable(1), title = "Centroid excursion")
 
-
-#I save the entry in the logbook
-#elog(title, message, attachments = [], author = None, category = "Info", domain = "", logbook = "SwissFEL commissioning data", encoding=1):
-#elog("Test Simona", "message", author = "Simona", get_plot_snapshots(), logbook = "SwissFEL commissioning data", encoding=1)
- 
+# save the entry in the logbook
+msg = str(r)
+msg = msg + "\nFile: " + get_context().path
+msg = msg + "\n\n" + r.print()
+elog("Gun solenoid current scan", msg , get_plot_snapshots())