1. MSE Pulsed Septum for g-2 and Mu2e Design Review A. Makarov 2/11/2016

2. MSE Pulsed Septum Magnet Specification 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review2 Injection System Layout A new Pulsed Septum Magnet was requested for the g-2 and Mu2e projects. The same magnet shall fit in both Injection and Abort systems.

3. MSE Pulsed Septum Magnet Specification 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review3 0.42 ”

4. MSE Pulsed Septum Magnet Specification 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review4 Abort System Layout

5. MSE Pulsed Septum Magnet Specification 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review5 0.78 ”

6. MSE Pulsed Septum Magnet Specification 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review6 The new MSE Septum Magnet has similar to the existing Booster BSE Pulsed Septum Magnet parameters: a fast (several 2-KHz-half- sine pulses per second), single turn curved magnet installed into vacuum box. The magnet shall operate at vacuum up to 1E-7 Torr in the high radiation area (which is typical for septum magnets).

7. MSE Pulsed Septum Magnet Specification Magnet Specification 2/11/2016 Makarov| MSE Pulsed Septum Magnet Design Review 7 BSEMSE Magnet gap, inch1.101.85 Good Field Area (V x H)1.0 x 1.01.6 x 1.6 Peak Integrated Strength, T-m1.51.4 Septum Radius, m38.153.3 Magnetic Length, m1.661.92 Bend Angle, mrad5039 Current Pulse Width, µsec250 < base width < 500250 < base width < 300 Max Pulse Repetition1 Pulse at 15 Hz8 or 16 Pulses within 1.33 sec Total Package Length, m1.882.4

8. MSE Pulsed Septum Magnet Specification 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review8 This is the g-2 pulse pattern required at 0.49 T-m MAX field

9. MSE Pulsed Septum Magnet Specification 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review9 This is the Mu2e pulse pattern required at 1.4 T-m MAX field

10. BSE and MSE Pulsed Septum Magnets Laminations 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review10 BSE LaminationMSE Lamination This slide demonstrates the difference in laminations for BSE and MSE Septum magnets and related to this difference in the core cooling concept (this is a significant improvement of the MSE core cooling efficiency and magnet insulation reliability).

11. BSE Pulsed Septum Magnet 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review11 The core cooling line in the BSE magnet has very small contact area with the core (0.25” dia SS tube), so the core cooling efficiency is relatively low.

12. BSE Pulsed Septum Magnet 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review12 The septum conductor in the BSE magnet was welded to the core which is not the best solution because of epoxy fumes compromise weld quality making the welds properties un-predictable.

13. MSE Pulsed Septum Magnet 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review13 The MSE Pulsed Septum Magnet is a single turn curved magnet with the septum conductor inner surface radius of 53.3 m. R = 53.3 m

14. MSE Pulsed Septum Magnet Concept and Core Cooling Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review14

15. MSE Pulsed Septum Magnet 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review15

16. MSE Pulsed Septum Magnet Septum Conductor Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review16 Inner Conductor Clamping Plate Septum Conductor Clamping Bars

17. MSE Pulsed Septum Magnet Inner Conductor Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review17 Seven stacks of special laminations installed on the core ends create a Rogowski profile, which helps to prevent overheating of pole corners. Inner Conductor Clamp Plates

18. MSE Pulsed Septum Magnet Septum Conductor Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review18 Septum Conductor Clamps Jumper between Septum and Inner Conductor

19. MSE Pulsed Septum Magnet Power Leads Connection and Cooling Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review19 Water Cooled Power Rod Special Fitting

20. MSE Pulsed Septum Magnet Power Leads Connection and Cooling Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review20 Water Supply Line Water Return Line

21. MSE Pulsed Septum Magnet Power Leads Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review21 Water Return Line Water Supply Line Special Fitting

22. MSE Pulsed Septum Magnet Power Connection Clamp 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review22

23. MSE Pulsed Septum Magnet Power Connection 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review23 Power Strip Line

24. MSE Pulsed Septum Magnet Power Leads Cooling Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review24 Jumper between Septum and Inner Conductor

25. MSE Pulsed Septum Magnet Coil Buses Cooling Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review25

26. MSE Pulsed Septum Magnet Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review26 87.625” VACUUM BOX LENGTH (2.226 m) 75.60” CORE LENGTH (1.92 m)

27. MSE Pulsed Septum Magnet Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review27 3.26” 34.4 mr

28. MSE Pulsed Septum Magnet Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review28 2.14” 3.1 mr

29. MSE Pulsed Septum Magnet Design 2/11/2016Makarov| MSE Pulsed Septum Magnet Design Review29 Conclusions: A new Pulsed Septum Magnet was designed for the g-2 and Mu2e projects. The same magnet will be used for the beam injection and beam abort systems. The magnet meets all specification requirements. The new magnet design has some critical improvements compare to the existing BSE Pulsed Septum Magnet which is successfully working in Fermilab Booster for over 10 years.