Difference between revisions of "Beam Test Jul 16 2012"

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Line 54: Line 54:
 
== Scintillator pulse count  ==
 
== Scintillator pulse count  ==
  
 +
Scintillator is located at the end of the 90 degree beamlien (after the thin window). Rates measured with W1 in and out.
  
  
Line 63: Line 64:
 
| Solenoid 2      || 1.2    A
 
| Solenoid 2      || 1.2    A
 
|-
 
|-
−
| Gun Hor        ||  -0.1 A
+
| Gun Hor        ||  0  A
 
|-
 
|-
−
| Gun Ver        || 0 A
+
| Gun Ver        || +0.2 A
 
|-
 
|-
−
|Output Hor      ||  +0.2 A
+
|Output Hor      ||  +1.2 A
 
|-
 
|-
−
| Output Ver    || +0.4 A
+
| Output Ver    || 0  A
 
|-
 
|-
 
| Rep Rate    || 8
 
| Rep Rate    || 8
Line 77: Line 78:
 
|  Gun Grid Voltage  ||  10 (Knob Setting)
 
|  Gun Grid Voltage  ||  10 (Knob Setting)
 
|-
 
|-
−
|  RF frequency  ||2856.272 MHz
+
|  RF frequency  ||2856.304 MHz
 +
|-
 +
|  Modulator HV Power Supply  || 4.28 (Knob Setting)
 +
|-
 +
|  RF macro Pulse Length (FWHM)  || 300 ns
 +
|- 
 +
|Q1  (A)|| -10
 +
|- 
 +
|Q2  (A)|| -10
 +
|- 
 +
|Q3  (A)|| 0
 +
|- 
 +
|Q4  (A)|| -2.3
 +
|- 
 +
|Q5  (A)|| 2.5
 +
|- 
 +
|Q6  (A)|| -3.5
 +
|-
 +
|Q7  (A)|| -6.1
 +
|- 
 +
|Q8  (A)|| 0
 +
|- 
 +
|Q9  (A)|| +0.6
 +
|-
 +
|Q10  (A)|| -0.4
 +
|-
 +
|}
 +
 
 +
 
 +
 
 +
 
 +
{| border="1"
 +
| W1  || Time (s) || D1 (A) || Jaws|| Counts || counts/second || conditions
 +
|-
 +
|  in ||  209.1 || 0 || Full open ||1842  || 8.81 || tuned to fc1 10 MeV
 +
|-
 +
|  out || 192.5 || 0 || Full open|| 1052 || 5.46 ||tuned to fc1 10 MeV
 +
|-
 +
|  in || 226 || 2.5 || Full open||  2082 || 9.21 || tuned to fc2  1 MeV
 +
|-
 +
|  in || 205 || 18.8 || Full open|| 1784  || 8.7 || tuned to fc2  10 MeV
 +
|-
 +
|  out ||  18.8 || Full open|| ||  || too much pile-ups || tuned to fc2  10 MeV
 +
|-
 +
|}
 +
 
 +
 
 +
=== Bend the beam by 45 degree ===
 +
When we bend the beam by 45 degree, there were too much current on the scintilator. Gun grid voltage is lowered to lower the current.
 +
 
 +
 
 +
{| border="1"
 +
| Energy Switch || Out (High En)
 +
|-
 +
| Solenoid 1    || 6.8  A 
 +
|-
 +
| Solenoid 2      || 1.2    A
 +
|-
 +
| Gun Hor        ||  0  A
 +
|-
 +
| Gun Ver        || +0.2 A
 +
|-
 +
|Output Hor      ||  +1.2 A
 +
|-
 +
| Output Ver    || 0  A
 +
|-
 +
| Rep Rate    || 8
 +
|-
 +
|  Gun HV  ||  10 (Knob Setting)
 +
|-
 +
|  Gun Grid Voltage  ||  6.42 (Knob Setting)
 +
|-
 +
|  RF frequency  ||2856.304 MHz
 
|-
 
|-
 
|  Modulator HV Power Supply  || 4.28 (Knob Setting)
 
|  Modulator HV Power Supply  || 4.28 (Knob Setting)
Line 83: Line 156:
 
|  RF macro Pulse Length (FWHM)  || 300 ns
 
|  RF macro Pulse Length (FWHM)  || 300 ns
 
|-   
 
|-   
−
|Q1  (A)|| -2.6
+
|Q1  (A)|| -10
 +
|- 
 +
|Q2  (A)|| -10
 +
|- 
 +
|Q3  (A)|| 0
 
|-   
 
|-   
−
|Q2 (A)|| -3.2
+
|Q4 (A)|| -2.3
 
|-   
 
|-   
−
|Q3 (A)|| -3.6
+
|Q5 (A)|| 2.5
 
|-   
 
|-   
−
|Q4 (A)|| -1.5
+
|Q6 (A)|| -3.5
 +
|-
 +
|Q7  (A)|| -6.1
 
|-   
 
|-   
−
|Q5 (A)|| +0.7
+
|Q8 (A)|| 0
 
|-   
 
|-   
−
|Q6 (A)|| -3.6
+
|Q9  (A)|| +0.6
 +
|-
 +
|Q10 (A)|| -0.4
 +
|-
 +
|}
 +
 
 +
 
 +
=== Bend the beam by 90 degree ===
 +
 
 +
same tune as above
 +
 
 +
{| border="1"
 +
| W1  ||  D1 (A) || D2 (A) || Jaw width (cm) || Time (s) || Counts || counts/second || conditions
 +
|-
 +
|  in ||  5.8  || 3 ||  0.2  || 209.9  || 844+- 29.1 || 4.02+-0.14  || D1 tuned for 3 Mev, D2 tuned for 1.2694 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||  239.8  || 1212+-34.8 || 5.05+- 0.15 || D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 9 ||  0.2  || 359.9  ||  1508+-38.8  || 4.19+-0.11  || D1 tuned for 3 Mev, D2 tuned for 4.9 MeV
 +
|-
 +
|}
 +
 
 +
=== Play with quads ===
 +
 
 +
same tune as above, except change in some of the quads.
 +
 
 +
Change quads: q4, q5, q6, q7, see the change in the rate.
 +
 
 +
{| border="1"
 +
| W1  ||  D1 (A) || D2 (A) || Jaw width (cm) || q4 (A) || q5 (A) || q6 (A) || q7 (A) || q8 (A)|| q9 (A) || q10 (A) || Counts || Time (s)|| counts/second || Mean pulse area in the scope|| conditions
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||- 0  ||+ 0 ||- 0 ||- 0 || 0 || 0.6 || 0.4  || 3598  || 279.9  || 12.85    || || D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||- 2  || +0 ||-  0 ||- 0 ||  0 || 0.6 || 0.4  || 3895    ||  299.4  || 13.01  ||  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || +0 || - 0 ||- 0 ||  0 || 0.6 || 0.4  || 2757  || 200.1  || 13.78  ||  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || +2 || - 0 ||- 0 || 0 || 0.6 || 0.4  || 2522  ||  199.9  || 12.62  ||  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || - 0 ||- 0 ||  0 || 0.6 || 0.4  || 3598  || 244.9  || 14.69  ||  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || - 2 ||- 0 ||  0 || 0.6 || 0.4  || 2996 ||  340  ||  8.81 || 7.8 n ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || + 2 ||- 0 || 0 || 0.6 || 0.4 || 1777  ||  199.9  ||  8.89 || 8.2 n ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || + 0 ||- 0 || 0 || 0.6 || 0.4 || 3746  || 259.8  ||  14.42 || 5.1 n ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || + 0 ||- 2 ||  0 || 0.6 || 0.4  || 3049  ||  220.2  || 13.85  || 5.7 n ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || + 0 ||+ 2 ||  0 || 0.6 || 0.4  || 3062  ||  252.7 || 12.11  || 5.9 n ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || + 0 ||+ 0 ||  0 || 0 || 0  || 2729 ||  210.1  || 13.0  || 5.5 n ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || + 0 ||+ 0 ||  + 2 || + 0 || + 0  || 1133  ||  250.1  ||  4.5  || 6.7 n  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || + 0 ||+ 0 ||  + 0 || + 0 || + 0  ||  ||    ||    ||  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|}
 +
 
 +
We placed a permanent dipole magnet to sweep the beam. The sweeping magnet added to the end of the 3rd triplet magnets to sweep the beam.
 +
 
 +
 
 +
{| border="1"
 +
| W1  || Sweeping magnet  ||  D1 (A) || D2 (A) || Jaw width (cm) || q4 (A) || q5 (A) || q6 (A) || q7 (A) || q8 (A)|| q9 (A) || q10 (A) || Counts ||  Time (s)|| counts/second || conditions
 +
|-
 +
|  in || in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || + 0 ||- 0 ||  0 || 0.6 || 0.4  ||  398 || 114.2  || 3.5  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in || in ||  5.8  || 0 || 0.2  ||- 2  || +2 ||  0 || 0 ||  0 || -0.6 ||- 0.4  || 587  || 152.6  || 3.8  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  in || -5.8  || 0 || 0.2  ||- 2  || +2 ||  0 || 0 ||  0 || -0.6 ||- 0.4  || 884  || 240.5  || 3.8  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 
|-
 
|-
 
|}
 
|}
  
−
Scintillator is located at the end of the 90 degree beamlien (after the thin window). Rates measured with W1 in and out.
+
 
 +
We removed the permanent dipole magnet.
  
 
{| border="1"
 
{| border="1"
−
| W1  || Time (s) || D1 (A) || Counts || counts/second || conditions
+
| W1   || Sweeping magnet || D1 (A) || D2 (A) || Jaw width (cm) || q4 (A) || q5 (A) || q6 (A) || q7 (A) || q8 (A)|| q9 (A) || q10 (A) || Counts ||  Time (s)|| counts/second || conditions
 
|-
 
|-
−
|  in ||  209.1 || 0  ||1842 || 8.81 || tuned to fc1 10 MeV
+
|  in ||  out || -5.8  || 0 || 0.2  ||- 2  || +2 || 0 || 0 ||  0 || -0.6 ||- 0.4  || 837  || 204  || 4.10  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV  
 
|-
 
|-
−
|  out || 192.5 || 0 || 1052 || 5.46 ||tuned to fc1 10 MeV
+
|}
 +
 
 +
= Positron Energy Scan =
 +
 
 +
Data from above runs used to get the energy profile of positrons around 3 MeV.
 +
 
 +
== Measurements ==
 +
 
 +
same tune as above
 +
 
 +
{| border="1"
 +
| W1  ||  D1 (A) || D2 (A) || Jaw width (cm) || Time (s) || Counts || counts/second || conditions
 
|-
 
|-
−
|  in || 226 || 2.5 || 2082 || 9.21 || tuned to fc2  1 MeV
+
|  in ||   5.8  || 3 ||  0.2 || 209.9  || 844+- 29.1 || 4.02+-0.14  || D1 tuned for 3 Mev, D2 tuned for 1.2694 MeV  
 
|-
 
|-
−
|  in || 205 || 18.8 || 1784 || 8.7 || tuned to fc2  10 MeV
+
|  in ||   5.8  || 5.8 || 0.2  ||  239.8 || 1212+-34.8 || 5.05+- 0.15 || D1 tuned for 3 Mev, D2 tuned for 3 MeV  
 
|-
 
|-
−
|  out ||  || 18.8 ||  || too much pile-ups || tuned to fc2  10 MeV
+
|  in ||   5.8 || 9 ||  0.2  || 359.9   || 1508+-38.8  || 4.19+-0.11  || D1 tuned for 3 Mev, D2 tuned for 4.9 MeV  
 
|-
 
|-
 
|}
 
|}
 +
 +
== Background ==
 +
We placed a permanent dipole magnet to sweep the beam. The sweeping magnet added to the end of the 3rd triplet magnets to sweep the beam.
  
  
 
{| border="1"
 
{| border="1"
−
| W1  || D1 (A) || D2 (A)|| || Time (s) || Counts || counts/second || conditions
+
| W1  || Sweeping magnet  ||  D1 (A) || D2 (A) || Jaw width (cm) || q4 (A) || q5 (A) || q6 (A) || q7 (A) || q8 (A)|| q9 (A) || q10 (A) || Counts ||  Time (s)|| counts/second || conditions
 +
|-
 +
|  in || in ||  5.8  || 5.8 || 0.2  ||+ 2  || -2 || + 0 ||- 0 ||  0 || 0.6 || 0.4  ||  398 || 114.2  || 3.5  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in || in ||  5.8  || 0 || 0.2  ||- 2  || +2 ||  0 || 0 ||  0 || -0.6 ||- 0.4  || 587  || 152.6  || 3.8  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 +
|-
 +
|  in ||  in || -5.8  || 0 || 0.2  ||- 2  || +2 ||  0 || 0 ||  0 || -0.6 ||- 0.4  || 884  || 240.5  || 3.8  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV
 
|-
 
|-
−
| in ||  || 5.8 || 3 ||   ||   || D1 tuned for 3 Mev, D2 tuned for 1.2694 MeV
+
|}
 +
 
 +
 
 +
We removed the permanent dipole magnet.
 +
 
 +
{| border="1"
 +
| W1   || Sweeping magnet  || D1 (A) || D2 (A) || Jaw width (cm) || q4 (A) || q5 (A) || q6 (A) || q7 (A) || q8 (A)|| q9 (A) || q10 (A) || Counts  ||  Time (s)|| counts/second ||  conditions
 
|-
 
|-
−
|  in ||   || 5.8  || 6 ||   ||   || D1 tuned for 3 Mev, D2 tuned for 3.13 MeV  
+
|  in || out || -5.8  || 0 || 0.2  ||- 2  || +2 ||  0 || 0 ||  0 || -0.6 ||- 0.4  || 837  || 204  || 4.10  ||D1 tuned for 3 Mev, D2 tuned for 3 MeV  
 
|-
 
|-
 
|}
 
|}
 +
 +
 +
== Data Analysis on Energy scan ==
 +
 +
D1 set for 3 MeV.
 +
 +
Sweeping Magnet    D2 (MeV)  Counts      Time (s)  Rate (Hz)
 +
    Out            1.2694    844+- 29.1  209.9      4.02+-0.14
 +
    Out            3        1212+-34.8  239.8      5.05+-0.15
 +
    Out            4.9      1508+-38.8  359.9      4.19+-0.11
 +
    in            3        398+-19.95  114.2     3.49+-0.18
 +
    in            0        587+-24.23   152.6      3.85+-0.16
 +
 +
 +
Two sweeping magnet in runs are background rates. Then the average background rates are 3.67+-0.12 Hz.
 +
 +
 +
After subtracting this background
 +
 +
    D2 (MeV)      Rate (Hz)
 +
    1.2694        0.35 +- 0.18 
 +
    3              1.38 +- 0.19           
 +
    4.9            0.52 +- 0.16
 +
 +
[[File:HRRL_pos_3MeV_Pos_Energy_scan_fit.png | 700 px]]
 +
[[File:HRRL_pos_3MeV_Pos_Energy_scan_fit_data.png | 700 px]]

Latest revision as of 00:32, 21 September 2012

Camera Trig

Tune the beam for 15 MeV range, see the beam with camera. Get camera triggering.

Tune The Beam for 11-12 MeV

Energy Switch Out (High En)
Solenoid 1 6.8 A
Solenoid 2 1.2 A
Gun Hor -0.1 A
Gun Ver 0 A
Output Hor +0.2 A
Output Ver +0.4 A
Rep Rate 8
Gun HV 10 (Knob Setting)
Gun Grid Voltage 10 (Knob Setting)
RF frequency 2856.272 MHz
Modulator HV Power Supply 4.28 (Knob Setting)
RF macro Pulse Length (FWHM) 300 ns
Q1 (A) -2.6
Q2 (A) -3.2
Q3 (A) -3.6
Q4 (A) -1.5
Q5 (A) +0.7
Q6 (A) -3.6

Beam Current 0 degree FC: Hrrl pos 16jul2012 FC0.png

Beam Spot at 0 degree OTR screen: Hrrl pos 16jul2012 OTR0.png


Scintillator pulse count

Scintillator is located at the end of the 90 degree beamlien (after the thin window). Rates measured with W1 in and out.


Energy Switch Out (High En)
Solenoid 1 6.8 A
Solenoid 2 1.2 A
Gun Hor 0 A
Gun Ver +0.2 A
Output Hor +1.2 A
Output Ver 0 A
Rep Rate 8
Gun HV 10 (Knob Setting)
Gun Grid Voltage 10 (Knob Setting)
RF frequency 2856.304 MHz
Modulator HV Power Supply 4.28 (Knob Setting)
RF macro Pulse Length (FWHM) 300 ns
Q1 (A) -10
Q2 (A) -10
Q3 (A) 0
Q4 (A) -2.3
Q5 (A) 2.5
Q6 (A) -3.5
Q7 (A) -6.1
Q8 (A) 0
Q9 (A) +0.6
Q10 (A) -0.4



W1 Time (s) D1 (A) Jaws Counts counts/second conditions
in 209.1 0 Full open 1842 8.81 tuned to fc1 10 MeV
out 192.5 0 Full open 1052 5.46 tuned to fc1 10 MeV
in 226 2.5 Full open 2082 9.21 tuned to fc2 1 MeV
in 205 18.8 Full open 1784 8.7 tuned to fc2 10 MeV
out 18.8 Full open too much pile-ups tuned to fc2 10 MeV


Bend the beam by 45 degree

When we bend the beam by 45 degree, there were too much current on the scintilator. Gun grid voltage is lowered to lower the current.


Energy Switch Out (High En)
Solenoid 1 6.8 A
Solenoid 2 1.2 A
Gun Hor 0 A
Gun Ver +0.2 A
Output Hor +1.2 A
Output Ver 0 A
Rep Rate 8
Gun HV 10 (Knob Setting)
Gun Grid Voltage 6.42 (Knob Setting)
RF frequency 2856.304 MHz
Modulator HV Power Supply 4.28 (Knob Setting)
RF macro Pulse Length (FWHM) 300 ns
Q1 (A) -10
Q2 (A) -10
Q3 (A) 0
Q4 (A) -2.3
Q5 (A) 2.5
Q6 (A) -3.5
Q7 (A) -6.1
Q8 (A) 0
Q9 (A) +0.6
Q10 (A) -0.4


Bend the beam by 90 degree

same tune as above

W1 D1 (A) D2 (A) Jaw width (cm) Time (s) Counts counts/second conditions
in 5.8 3 0.2 209.9 844+- 29.1 4.02+-0.14 D1 tuned for 3 Mev, D2 tuned for 1.2694 MeV
in 5.8 5.8 0.2 239.8 1212+-34.8 5.05+- 0.15 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 9 0.2 359.9 1508+-38.8 4.19+-0.11 D1 tuned for 3 Mev, D2 tuned for 4.9 MeV

Play with quads

same tune as above, except change in some of the quads.

Change quads: q4, q5, q6, q7, see the change in the rate.

W1 D1 (A) D2 (A) Jaw width (cm) q4 (A) q5 (A) q6 (A) q7 (A) q8 (A) q9 (A) q10 (A) Counts Time (s) counts/second Mean pulse area in the scope conditions
in 5.8 5.8 0.2 - 0 + 0 - 0 - 0 0 0.6 0.4 3598 279.9 12.85 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 - 2 +0 - 0 - 0 0 0.6 0.4 3895 299.4 13.01 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 +0 - 0 - 0 0 0.6 0.4 2757 200.1 13.78 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 +2 - 0 - 0 0 0.6 0.4 2522 199.9 12.62 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 -2 - 0 - 0 0 0.6 0.4 3598 244.9 14.69 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 -2 - 2 - 0 0 0.6 0.4 2996 340 8.81 7.8 n D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 -2 + 2 - 0 0 0.6 0.4 1777 199.9 8.89 8.2 n D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 -2 + 0 - 0 0 0.6 0.4 3746 259.8 14.42 5.1 n D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 -2 + 0 - 2 0 0.6 0.4 3049 220.2 13.85 5.7 n D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 -2 + 0 + 2 0 0.6 0.4 3062 252.7 12.11 5.9 n D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 -2 + 0 + 0 0 0 0 2729 210.1 13.0 5.5 n D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 -2 + 0 + 0 + 2 + 0 + 0 1133 250.1 4.5 6.7 n D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 5.8 0.2 + 2 -2 + 0 + 0 + 0 + 0 + 0 D1 tuned for 3 Mev, D2 tuned for 3 MeV

We placed a permanent dipole magnet to sweep the beam. The sweeping magnet added to the end of the 3rd triplet magnets to sweep the beam.


W1 Sweeping magnet D1 (A) D2 (A) Jaw width (cm) q4 (A) q5 (A) q6 (A) q7 (A) q8 (A) q9 (A) q10 (A) Counts Time (s) counts/second conditions
in in 5.8 5.8 0.2 + 2 -2 + 0 - 0 0 0.6 0.4 398 114.2 3.5 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in in 5.8 0 0.2 - 2 +2 0 0 0 -0.6 - 0.4 587 152.6 3.8 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in in -5.8 0 0.2 - 2 +2 0 0 0 -0.6 - 0.4 884 240.5 3.8 D1 tuned for 3 Mev, D2 tuned for 3 MeV


We removed the permanent dipole magnet.

W1 Sweeping magnet D1 (A) D2 (A) Jaw width (cm) q4 (A) q5 (A) q6 (A) q7 (A) q8 (A) q9 (A) q10 (A) Counts Time (s) counts/second conditions
in out -5.8 0 0.2 - 2 +2 0 0 0 -0.6 - 0.4 837 204 4.10 D1 tuned for 3 Mev, D2 tuned for 3 MeV

Positron Energy Scan

Data from above runs used to get the energy profile of positrons around 3 MeV.

Measurements

same tune as above

W1 D1 (A) D2 (A) Jaw width (cm) Time (s) Counts counts/second conditions
in 5.8 3 0.2 209.9 844+- 29.1 4.02+-0.14 D1 tuned for 3 Mev, D2 tuned for 1.2694 MeV
in 5.8 5.8 0.2 239.8 1212+-34.8 5.05+- 0.15 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in 5.8 9 0.2 359.9 1508+-38.8 4.19+-0.11 D1 tuned for 3 Mev, D2 tuned for 4.9 MeV

Background

We placed a permanent dipole magnet to sweep the beam. The sweeping magnet added to the end of the 3rd triplet magnets to sweep the beam.


W1 Sweeping magnet D1 (A) D2 (A) Jaw width (cm) q4 (A) q5 (A) q6 (A) q7 (A) q8 (A) q9 (A) q10 (A) Counts Time (s) counts/second conditions
in in 5.8 5.8 0.2 + 2 -2 + 0 - 0 0 0.6 0.4 398 114.2 3.5 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in in 5.8 0 0.2 - 2 +2 0 0 0 -0.6 - 0.4 587 152.6 3.8 D1 tuned for 3 Mev, D2 tuned for 3 MeV
in in -5.8 0 0.2 - 2 +2 0 0 0 -0.6 - 0.4 884 240.5 3.8 D1 tuned for 3 Mev, D2 tuned for 3 MeV


We removed the permanent dipole magnet.

W1 Sweeping magnet D1 (A) D2 (A) Jaw width (cm) q4 (A) q5 (A) q6 (A) q7 (A) q8 (A) q9 (A) q10 (A) Counts Time (s) counts/second conditions
in out -5.8 0 0.2 - 2 +2 0 0 0 -0.6 - 0.4 837 204 4.10 D1 tuned for 3 Mev, D2 tuned for 3 MeV


Data Analysis on Energy scan

D1 set for 3 MeV.

Sweeping Magnet D2 (MeV) Counts Time (s) Rate (Hz) 

   Out            1.2694    844+- 29.1   209.9      4.02+-0.14	
   Out            3         1212+-34.8   239.8      5.05+-0.15	
   Out            4.9       1508+-38.8   359.9      4.19+-0.11	
   in             3         398+-19.95   114.2	     3.49+-0.18
   in             0         587+-24.23	  152.6      3.85+-0.16


Two sweeping magnet in runs are background rates. Then the average background rates are 3.67+-0.12 Hz.


After subtracting this background 

   D2 (MeV)       Rate (Hz)
   1.2694         0.35 +- 0.18  
   3              1.38 +- 0.19            
   4.9            0.52 +- 0.16

HRRL pos 3MeV Pos Energy scan fit.png HRRL pos 3MeV Pos Energy scan fit data.png

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