Beam Test Apr 24 2012 - Revision history

Setisadi at 21:40, 24 April 2012

2012-04-24T21:40:53Z

Setisadi: /* 4-5 MeV Setting */

2012-04-24T21:28:06Z

4-5 MeV Setting

Setisadi: /* MeV Setting */

2012-04-24T20:19:14Z

MeV Setting

Setisadi: /* MeV Setting */

2012-04-24T20:19:04Z

MeV Setting

Setisadi: /* 10 MeV Second Setting- Saidq's Tune */

2012-04-24T20:01:59Z

10 MeV Second Setting- Saidq's Tune

Setisadi: /* 10 MeV Second Setting- Saidq's Tune */

2012-04-24T19:47:18Z

10 MeV Second Setting- Saidq's Tune

Setisadi: /* 10 MeV First Setting */

2012-04-24T19:44:43Z

10 MeV First Setting

Setisadi: /* 10 MeV Second Setting- Saidq's Tune */

2012-04-24T19:44:32Z

10 MeV Second Setting- Saidq's Tune

Setisadi: /* 10 MeV First Setting */

2012-04-24T19:44:20Z

10 MeV First Setting

Setisadi: /* 10 MeV */

2012-04-24T19:04:23Z

10 MeV

← Older revision		Revision as of 21:40, 24 April 2012
Line 274:		Line 274:
	\|}		\|}

−	~~== Quad Test ==~~

−		+	Gun has been up to air for 3 times. It could be oxidation, contamination. Or it could be gun died, less likely. Roasting the gun to burn off the contamination is an idea. Chad just roasted gun for with higher current, we saw gun current increased many times. We will leave roasted for one night.
−	~~=== Tune HRRL ===~~
−	~~Tune to following settings, observe beam. Check if there is mis-steering by quadrupole magnet.~~
−
−	~~This tune used for quad scan at Mar 17 2011, tuned by Dr. Kim.~~
−
−	~~{\| border="1"~~
−	~~\| Solenoid 1 \|\| 6.8 A~~
−	\|-
−	~~\|Solenoid 2 \|\| 10.4 A~~
−	\|-
−	\|Gun ~~Ver \|\| -0.2 A~~
−	\|-
−	~~\| Gun Hor \|\| +0.4 A~~
−	\|-
−	~~\|Output Hor \|\| -1.4A~~
−	\|-
−	~~\| Output Ver \|\| -0.5 A~~
−
−	\|-
−	~~\| Gun HV \|\| +9.75 (Knob Setting)~~
−	\|-
−	~~\| Gun Grid Voltage \|\| 5.25 (Knob Setting)~~
−	\|-
−	~~\| RF frequency \|\| 2855.816 MHz~~
−	\|-
−	~~\| Modulator HV Power Supply \|\| 4.42 (Knob Setting)~~
−	\|-
−	~~\| RF macro Pulse Length (FWHM) \|\| 200 ns~~
−	\|-
−	~~\| Peak Current on FC \|\| 37.2 mAmps~~
−	\|-
−	~~\| Scope on FC \|\| [[File:Scope_image_of_good_Accelarator_setting_by_Dr._Kim_Mar_17_2011.png \| 100 px]]~~
−	\|-
−	~~\| e- Beam Energy \|\| 14 MeV~~
−	\|}
−
−	~~=== Test mis-steering ===~~
−
−	~~Use OTR screen observe the beam. Turn all the quads off, except one at time. Change quad currents, see if mis-steering happens.~~
−
−	~~{\| border="1"~~
−	~~\| Quad \|\| Is there mis-steering? \|\| Beam images for different quad coil currents~~
−	\|-
−	~~\| Q1 \|\| \|\| [[File:hrrl_24Apr2012_QTest_q1_1Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q1_3Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q1_5Amp.png \| 200 px]]~~
−	\|-
−	~~\| Q2 \|\| \|\| [[File:hrrl_24Apr2012_QTest_q2_1Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q2_3Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q2_5Amp.png \| 200 px]]~~
−	~~\| Q3 \|\| \|\| [[File:hrrl_24Apr2012_QTest_q3_1Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q3_3Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q3_5Amp.png \| 200 px]]~~
−	\|-
−	~~\| Q4 \|\| \|\| [[File:hrrl_24Apr2012_QTest_q4_1Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q4_3Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q4_5Amp.png \| 200 px]]~~
−	\|-
−	~~\| Q5 \|\| \|\| [[File:hrrl_24Apr2012_QTest_q5_1Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q5_3Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q5_5Amp.png \| 200 px]]~~
−	~~\| Q6 \|\| \|\| [[File:hrrl_24Apr2012_QTest_q6_1Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q6_3Amp.png \| 200 px]] [[File:hrrl_24Apr2012_QTest_q6_5Amp.png \| 200 px]]~~
−	\|}
−
−	~~= Emittence Test (If time allows?) =~~
−
−	~~==Tune HRRL establish stable beam ==~~
−
−	~~1. Looking at the beam position on the screen and by the beam current on FC, try to align beam line. The goal is to center the beam on the screen, and maximize the FC charge as high as possible.~~
−
−	~~2. Reduced the mis-steering at the quadrupole by tuning steerers in the linac.~~
−
−	~~3. Optimize steerers, solenoids in linac~~ to ~~get a round electron beam shape and no steering at the quadrupole.~~
−
−	~~4. One good tune earlier for reference: [[https://wiki.iac.isu.edu/index.php/HRRL_03-17-2011#Good_Tune_Used_for_good_Scan Tune HRRL]]~~
−
−	~~== 10 MeV ==~~
−
−	~~Energy is set by bending the beam to dipole at specific current.~~
−
−	~~Set dipole current for 10 MeV, and bend the beam. Tune the beam energy, until we see peak current at the 45 degree Faraday cup.~~
−
−	~~=== Emittance measurement at 10 MeV ===~~
−
−	~~This is scan~~ for ~~10 MeV beam. 40 mAmps peak current. Q1 is on, All other quads are off.~~
−
−	~~1) Scan from -5 Amps to 5 Amps. Increment at 0.2 Amps.~~
−
−	3~~) Name images by numbers start from 1. Then go on. Like: -5 Amp is 1, -4.8 Amp is 2, and so on til 5 Amp is named 51.~~
−
−	~~4) Scan multiple~~ times ~~from -5 to 5 Amps, and put them in different folders~~. ~~Name folder by number~~, ~~like 1, 2, 3 etc. After finishing one scan go back to -5 Amps. When going back take small steps (like 1 Amp), do not jump from 5 Amps to -5 Amps directly~~. ~~After reaching back to -5, wait for few moment (like 10 s).~~
−
−	~~5) For each time, take back ground images. It should~~ be ~~done when RF is on and~~ gun ~~is off.~~
−
−	~~6) After the scan take a scope image for the current of the FC after the OTR screen. Lower the current~~, ~~so the vacuum window do not heat up~~. ~~This step is to check energy.~~
−
−	~~== 15 MeV ==~~
−
−	~~Energy is set by bending~~ the ~~beam~~ to ~~dipole at specific current.~~
−
−	~~Set dipole current for 15 MeV, and bend the beam. Tune~~ the ~~beam energy, until we see peak current at the 45 degree Faraday cup.~~
−
−	~~=== Emittance measurement at 15 MeV===~~
−
−
−	~~== 3 MeV ==~~
−
−	~~Energy~~ is ~~set by bending the beam to dipole at specific current~~.
−
−	~~Set dipole~~ current ~~for 15 MeV, and bend the beam. Tune the beam energy~~, ~~until~~ we ~~see peak~~ current ~~at the 45 degree Faraday cup~~.
−
−	~~=== Emittance measurement at 3 MeV===~~
−
−
−
−	~~== 7 MeV ==~~
−
−	~~Energy is set by bending the beam to dipole at specific current.~~
−
−	~~Set dipole current~~ for ~~7 MeV, and bend the beam~~. ~~Tune the beam energy, until we see peak current at the 45 degree Faraday cup.~~
−
−	~~=== Emittance measurement at 3 MeV===~~

@@ Line 266: / Line 266: @@
 |Q6  (A)|| 0
 |-
-|  Peak Current on FC    || 73.2 mAmps
+|  Peak Current on FC    ||  mAmps
 |-
-|  Scope on FC   ||  [[File:hrrl_24Apr2012_EnTest_14MeV_FC_cur.png | 200 px]]
+|  Scope on FC   ||  [[File:hrrl_24Apr2012_EnTest_4MeV_FC_cur.png | 200 px]]
 |-
 |-
-| Beam Spot ||  [[File:hrrl_24Apr2012_EnTest_14MeV_beam_im.png | 200 px]]
+| Beam Spot ||  [[File:hrrl_24Apr2012_EnTest_4MeV_beam_im.png | 200 px]]
 |}

← Older revision		Revision as of 20:19, 24 April 2012
Line 223:		Line 223:


−	==== MeV Setting ====	+	==== 4-5 MeV Setting ====

	Energy switch changed to low energy setting. Part of the cavity is grounded.		Energy switch changed to low energy setting. Part of the cavity is grounded.

@@ Line 228: / Line 228: @@
 {| border="1"
-|  e- Beam Energy  () ||  MeV
+| Energy Switch || In (Part of the cavity is grounded, HRRL low energy operation mode )
 |-
 | Solenoid 1     || 7.2 A

@@ Line 199: / Line 199: @@
 |-
 |   Modulator HV Power Supply   || 4.20 (Knob Setting)
 |-
 |  RF macro Pulse Length (FWHM)  || 300 ns

@@ Line 180: / Line 180: @@
 |  e- Beam Energy  () || 10 MeV
 |-
-| Solenoid 1     || 16.2 A
+| Solenoid 1     || 7.2 A
 |-
-| Solenoid 2      ||  0  A
+| Solenoid 2      ||  2.9  A
 |-
-| Gun Hor        || 0.1  A
+| Gun Hor        || 0  A
 |-
-| Gun Ver         || 1 A
+| Gun Ver         || 0 A
 |-
-|Output Hor      || 0.1 A
+|Output Hor      || -0.2 A
 |-
-| Output Ver     || 1 A
+| Output Ver     || 0.3 A
 |-
 |   Gun HV   || 10.00 (Knob Setting)
@@ Line 196: / Line 196: @@
 |   Gun Grid Voltage   || 10.00 (Knob Setting)
 |-
-|   RF frequency   || 2856.371 MHz
+|   RF frequency   || 2856.373 MHz
 |-
 |   Modulator HV Power Supply   || 4.20 (Knob Setting)
@@ Line 206: / Line 206: @@
 |Q2  (A)|| 0
 |-
-|Q3  (A)|| 0.3
+|Q3  (A)|| 0
 |-
-|Q4  (A)|| +9.9
+|Q4  (A)|| 0
 |-
-|Q5  (A)|| -7.7
+|Q5  (A)|| 0
 |-
-|Q6  (A)|| -4
+|Q6  (A)|| 0
 |-
-|  Peak Current on FC    || 88 mAmps
+|  Peak Current on FC    || 73.2 mAmps
 |-
 |  Scope on FC   ||  [[File:hrrl_24Apr2012_EnTest_14MeV_FC_cur.png | 200 px]]

@@ Line 131: / Line 131: @@
 {| border="1"
-|  e- Beam Energy  () || 14 MeV (with big power supply Check with chad)
+|  e- Beam Energy  () || 10 MeV (with big power supply Check with chad)
 |-
 | Solenoid 1     || 16.2 A
@@ Line 174: / Line 174: @@
 | Beam Spot ||  [[File:hrrl_24Apr2012_EnTest_14MeV_beam_im.png | 200 px]]
 |}
 ==== 10 MeV Second Setting- Saidq's Tune ====

@@ Line 128: / Line 128: @@
-==== 10 MeV ====
+==== 10 MeV First Setting ====
 {| border="1"
@@ Line 164: / Line 164: @@
 |-
 |Q5  (A)|| -7
 |-
 |Q6  (A)|| -4