1. SHMS Q2 with Beam Line Shield Pipe
Updated Oct 6, 2016

2. HB case 9.3 & V10
HB with additional Side plates, Front field clamp and NO Beamline shielding.
What was asked for at the meeting.

3. HB Case v10 Sum of Stray Fields Fitted Data [T.m]
Spectrometer Angle 5.5°
HB (v10) Q1 Q2 Q3
criteria < gev/c
Momentum [Gev/c]
Side Fe / Field Clamp
unshielded
Sum 3
-0.005
-0.001
0.003
-0.004 5
-0.007
-0.002
0.008
-0.003
0.005 6
-0.009
0.012
0.007 7
-0.013
0.016 8
-0.018
0.020
0.009 9
-0.027
0.002
0.027
-0.006
0.010 10
-0.040
0.013
0.039
0.011 11
-0.060
0.038
0.060
-0.015
0.023

4. Q2’s Beam Line Shield Pipe
OD 5.5”
ID 5.05”
Thickness 0.25”
Length 96.0”
Material 1006 steel
Weight ~85 lbs

5. Q2 at 3660A [11.33Gev] Base model - Pipes have air properties

6. Q2 at 3660A [11.33Gev] Beam Line Shield at 5.5 degrees
Max Field in Pipe is 1.75 T

7. Q2 at 3660A [11.33Gev] Beam Line Shield at 10 degrees
Max Field in Pipe is 0.3 T

8. Q2 - Stray Field Plot - ¼” thick Pipe 3,660A
5.5 Degrees SF = 76,613 G.cm Base
SF = 8,352 G.cm Shielded
10 Degrees SF = 16,429 G.cm Base
SF = 3,556 G.cm Shielded

9. Beam Line Shield Pipe OD 5.5” ID 5.25” Thickness 1/8” Length 96.0”
Material 1006 steel
Weight ~43 lbs

10. Q2 - Stray Field Plot - 1/8” thick Pipe 3,660A
5.5 Degrees SF = 76,699 G.cm Base
SF = 19,464 G.cm Shielded
10 Degrees SF = 16,429 G.cm Base
SF = 3,707G.cm Shielded

11. Beam Line Shield Flared Half Pipe
OD 5.5”
ID 5.25”, then flared
Thickness 1/4”
Length 96.0”
Material 1006 steel
Attached to Magnet and travels with magnet.

12. Q2- Stray Field Plots ¼” Flared Beam Pipe 3,660A
5.5 Degrees SF = 76,758 G.cm Base
SF = 29,027 G.cm Shielded
10 Degrees SF = 16,422 G.cm Base
SF = 15,087 G.cm Shielded

13. Q2 Beam Line Shielding Results Stray Field Integrals [G.cm]
Base 5.5 deg
Shielded 5.5 deg
Reduction factor
Base 10.0 deg
Shielded 10 deg
1/4” beam Pipe
76,613
8,352
9.2
16,429
3,556
4.6
1/8” beam pipe
76,699
19,464
3.9
3,707
4.4
¼” half pipe flared wings
76,758
29,027
2.6
16,422
15,087
1.1
Variations in Base Stray Field mainly due to meshing effects on solution