# Presentation: 535370

## Wrapup ofElectrostatic and MagnetostaticAnalysis of Target Region

- ANSYS model results
- and conclusions

- R.E. Mischke
- 1 October 2001

## E field (deep recess)

- S           EFSUM
- 0.0000      11.759
- 3.7500      11.749
- 7.5000      11.757
- 10.600      11.762
- 14.350      11.764
- 18.100      11.765
- 21.200      11.074
- 24.950      12.221
- 28.700      11.022

## V (deep recess)

## E field (default recess)

-  S           EFSUM
-    0.0000      11.807
-    3.7000      11.697
-    7.4000      11.799
-    10.500      11.883
-    14.200      11.627
-    17.900      11.892
-    21.000      11.651
-    24.700      11.543
-    28.400      11.756

## V (default recess)

## E field (shallow recess)

-  S           EFSUM
-    0.0000      11.842
-    3.7500      11.666
-    7.5000      11.824
-    10.600      11.957
-    14.350      11.544
-    18.100      11.987
-    21.200      12.876
-    24.950      11.170
-    28.700      12.545

## V (shallow recess)

## Rounded corners

-  S           EFSUM
-    0.0000      11.805
-    3.7000      11.700
-    7.4000      11.797
-    10.500      11.873
-    14.200      11.637
-    17.900      11.882
-    20.450      11.438
-    23.650      11.554
-    26.850      11.422

## No recess

-  S           EFSUM
-    0.0000      11.917
-    3.7500      11.603
-    7.5000      11.864
-    10.600      12.094
-    14.350      11.381
-    18.100      12.171
-    21.200      14.378
-    24.950      10.481
-    28.700      13.938

## Shorten plates

-  S           EFSUM
-    0.0000      11.858
-    3.7500      11.601
-    7.5000      11.926
-    10.600      12.183
-    14.350      11.376
-    18.100      12.091
-    21.200      14.207
-    24.950      10.452
-    28.700      14.184

## Balance dielectric

-  S           EFSUM
-    0.0000      11.870
-    3.7500      11.651
-    7.5000      11.824
-    10.600      11.978
-    14.350      11.504
-    18.100      12.044
-    21.200      13.160
-    24.950      10.970
-    28.700      12.812

## E field (smaller cell)

-      S           EFSUM
-    0.0000      11.871
-    3.7500      11.640
-    7.5000      11.858
-    9.9000      11.950
-    13.650      11.578
-    17.400      11.977
-    19.900      11.440
-    23.650      11.553
-    27.400      11.307

- 17.5 cm

## E field (small cell, shorten plates)

-  S           EFSUM
-    0.0000      11.865
-    3.6500      11.641
-    7.4000      11.858
-    9.8000      11.951
-    13.550      11.578
-    17.200      11.956
-    19.700      11.802
-    23.350      11.550
-    27.100      11.980

- 16.33 cm

## E field (reduce plate size)

-  S           EFSUM
-    0.0000      11.870
-    3.6500      11.641
-    7.4000      11.853
-    9.8000      11.945
-    13.550      11.578
-    17.200      11.962
-    19.700      11.840
-    23.350      11.549
-    27.100      12.031

-  S           EFSUM
-    0.0000      11.874
-    3.6500      11.641
-    7.4000      11.849
-    9.8000      11.939
-    13.550      11.578
-    17.200      11.968
-    19.700      11.713
-    23.350      11.548
-    27.100      11.866

-  S           EFSUM
-    0.0000      11.882
-    3.6500      11.640
-    7.4000      11.841
-    9.8000      11.931
-    13.550      11.577
-    17.200      11.978
-    19.700      11.791
-    23.350      11.547
-    27.100      11.816

- 14.96 cm

- 13.69 cm

- 12.42 cm

## E field (10 cm plate)35 cm shell

-  S           EFSUM
-    0.0000      11.916
-    3.6500      11.638
-    7.4000      11.813
-    9.8000      11.898
-    13.550      11.572
-    17.200      12.021
-    19.700      11.750
-    23.350      11.523
-    27.100      11.706

- 9.88 cm

## E field (10 cm plate)25 cm shell

-  S           EFSUM
-    0.0000      11.975
-    3.6500      11.639
-    7.4000      11.754
-    9.8000      11.825
-    13.550      11.573
-    17.200      12.093
-    19.700      11.998
-    23.350      11.526
-    27.100      11.635

## E field (10 cm plate)30 cm shell

-  S           EFSUM
-    0.0000      11.935
-    3.6500      11.638
-    7.4000      11.794
-    9.8000      11.874
-    13.550      11.572
-    17.200      12.045
-    19.700      11.392
-    23.350      11.524
-    27.100      11.307

## E field (conclusions)

- Uniformity in cell:
- 0.1% without side walls
- 1% with recess
- Peak E field is ~1.5 of value in cell
- Next step
- 3D model

## mbig

- 0

- 0.1

- 0.2

- -.1

- -.2

-    z (25 cm)

- x (10 cm)

- (6 cm) y

- -.1

- 0

- -.2

- Coil: 35 cm radius x 1393 mm half length
- Shield: 56.0 cm radius x 1418 mm half length

## B field conclusions

- Uniformity 0.1% over target cells achieved
- Nonuniform coil spacing required
- Position of superconducting shield tuned
- Next step
- try to reduce dimensions of coil and shield

## current dimensionsthat meet design criteria

- HV plate: 4 in thick × 30 cm wide × 80 cm long
- Ground plates: 2 in thick × 25 cm wide × 75 cm long
- Gap: 3 in
- Target cell: 3 in × 4 in × 50 cm, plus 1⁄2 in walls
- Coil radius (ground cylinder): 30 cm
- Coil length: 2.4 m
- Superconducting shield: 48 cm radius × 2.43 m long

## HV test setup

## Detail of HV test