#Tool to align the laser on the cathode.
# S. Bettoni, A. Gobbo, D. Voulot
#10/05/2016


#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

#caput("shutter:state", Closed)

start_I = 0.001 #20
end_I = 0.005 #150
step_I = 0.0001 #1

#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)

#I take the result of the scan and I do the plots
x = r.getReadable(0)
y = r.getReadable(1)
plot(y, xdata=x, title = "CM")




#I save the entry in the logbook