Emittance Measurement with Optical transition Radiation (OTR) - Revision history

Setisadi at 16:12, 2 February 2012

2012-02-02T16:12:58Z

2011-03-09T03:59:32Z

Beam Based Alignment Procedure

2011-03-09T03:57:22Z

2011-03-09T03:47:28Z

Find Best Steering Set

2011-03-08T22:38:36Z

Find Best Steering Set

2011-03-08T22:06:51Z

Steering the beam out of cavity straightly

2011-03-08T22:05:55Z

Steering the beam out of cavity straightly

2011-03-08T22:05:47Z

Steering the beam out of cavity straightly

2011-03-08T21:53:21Z

2011-03-07T19:37:30Z

Beam Line Alignment

← Older revision		Revision as of 16:12, 2 February 2012
Line 4:		Line 4:

	= Set Up =		= Set Up =
		+
		+	OTR target is 1.25’’ in diameter (31.75 mm). OTR target is 10 <math>\mu m</math> thick Aluminium.

	== Determining if we are getting OTR ==		== Determining if we are getting OTR ==

← Older revision		Revision as of 03:59, 9 March 2011
Line 32:		Line 32:
	= Beam Based Alignment Procedure =		= Beam Based Alignment Procedure =

−	HRRL_03-14-2011	+	[[HRRL_03-14-2011]]

← Older revision		Revision as of 03:57, 9 March 2011
Line 32:		Line 32:
	= Beam Based Alignment Procedure =		= Beam Based Alignment Procedure =

−	~~== Find Best Steering Set ==~~	+	HRRL_03-14-2011
−
−	~~1) The most upstream solenoid is used to adjust the gun emmittance and the downstream solenoid will adjust the beam size. Turn off both solenoids~~
−
−	~~2) Turn off all the quads.~~
−
−	~~3) Maximize the transmission along the zero beam line using the front and rear steering coils~~
−
−	~~4) Turn on the beam downstream solenoid and to adjust the beam spot size. If the beam spot moves on the OTR target, then the beam is not coming out of the HRRL.beam center moves on the screen?~~
−
−	~~5) Adjust the HRRL steering coils until the beam spot does not move when the downstream solenoid current changes.~~
−
−	~~6) Repeat step 3 and 4, until beam center does not change by change solenoid strength.~~
−
−	~~This is the best steering set. Record corresponding current settings.~~
−
−	~~== Quad centering ==~~
−
−	~~1) Turn on just one quad at a time. Change quad strength, see if there is steering by the quad.~~
−
−	~~2) If there is steering by the quad, move the quad. If the steering is vertical (horizontally) move the quad vertically (horizontally). Do it Until beam can not be steered by the quad.~~
−
−	~~3) Repeat 2 for all the quads.~~

@@ Line 38: / Line 38: @@
 ) Turn off all the quads.
-) Maximize the transmission to along the zero beam line using the front and rear steering coils
+) Maximize the transmission along the zero beam line using the front and rear steering coils
 ) Turn on the beam downstream solenoid and to adjust the beam spot size.  If the beam spot moves on the OTR target, then the beam is not coming out of the HRRL.beam center moves on the screen?

@@ Line 34: / Line 34: @@
 == Find Best Steering Set ==
-) Dis-attach 2 solenoids connected in serial.
+) The most upstream solenoid is used to adjust the gun emmittance and the downstream solenoid will adjust the beam size.  Turn off both solenoids
 ) Turn off all the quads.
-) Play with steering coils on the back and front of the cavity to get maximum transmission to the FC.
+) Maximize the transmission to along the zero beam line using the front and rear steering coils
-) Change solenoid strength, see if the beam center moves on the screen?
+) Turn on the beam downstream solenoid and to adjust the beam spot size.  If the beam spot moves on the OTR target, then the beam is not coming out of the HRRL.beam center moves on the screen?
-) If moves, change steering coils to compensate.
+) Adjust the HRRL steering coils until the beam spot does not move when the downstream solenoid current changes.
 ) Repeat step 3 and 4, until beam center does not change by change solenoid strength.

@@ Line 32: / Line 32: @@
 = Beam Based Alignment Procedure =
-== Steering the beam out of cavity straightly ==
+== Find Best Steering Set ==
 ) Dis-attach 2 solenoids connected in serial.
@@ Line 45: / Line 45: @@
 ) Repeat step 3 and 4, until beam center does not change by change solenoid strength.
 == Quad centering ==

← Older revision		Revision as of 21:53, 8 March 2011
Line 28:		Line 28:

	== Plan ==		== Plan ==
		+
		+
		+	= Beam Based Alignment Procedure =
		+
		+	== Steering the beam out of cavity straightly ==
		+
		+	1) Dis-attach 2 solenoids connected in serial.
		+
		+	2) Turn off all the quads. Play with steering coils on the back and front of the cavity to get maximum transmission to the FC.
		+
		+	3) Change solenoid strength, see if the beam center moves on the screen?
		+
		+	4) If moves, change steering coils to compensate.
		+
		+	5) Repeat step 3 and 4, until beam center does not change by change solenoid strength.
		+
		+	== Quad centering ==
		+
		+	1) Turn on just one quad at a time. Change quad strength, see if there is steering by the quad.
		+
		+	2) If there is steering by the quad, move the quad. If the steering is vertical (horizontally) move the quad vertically (horizontally). Do it Until beam can not be steered by the quad.
		+
		+	3) Repeat 2 for all the quads.

@@ Line 19: / Line 19: @@
 From the March 3rd Run, we can see that the beam line is not aligned. We need to align it.
-=== Equipments Needed ===
+== Equipments Needed ==
 ) Laser beam.
@@ Line 27: / Line 26: @@
 ) Mirrors.
 ) Crosses.