1. Irradiations at Birmingham cyclotron Procedure 1

2. Carbon fibre frame + Al plate 2

3. Carbon fibre frame (0.3mm thick, mass = nn g) 3

4. Al plate (2mm thick; mass = xx g) 4

5. C fibre fame, taped to Al plate; small strips of kapton tape overlaid over frame and plate to avoid sensors slipping between the plate and frame. 5

6. Tools required 6

7. Fresh sensor from Hamamatsu envelope 7

8. Kapton tape, partly overlapped. One side sticky Both sides not sticky Both sides non- sticky 8

9. Sensor lying in cutout of frame (cutout =11mm sq while sensor is 10mm sq). 9

10. Sensors, placed in cutouts of 3x3 frame; held in place by double sided kapton tape, with sticky edge on C fibre frame. One side sticky (on frame) Both sides non- sticky, overlapping edge of sensor 10

11. Threads prevent sensors falling out of cutouts. 11

12. Ensemble placed in plastic bag for safe-keeping. 12

13. Nickel foils place in another 3x3 C fibre frame, in locations corresponding to those of the sensors. (for fluence determination). 13

14. Frame + sensors fixed to top lid of cold box. Nitrogen gas pipe L shaped perspex fixing pieces, screwed into box lid. Frames clip into these pieces. Spring clips 14

15. Frame + sensors fixed to top lid of cold box. 15 Cold box lid, upside down Incident protons Al plate downstream of sensors

16. C fibre frames, one for Ni foils and one for sensors, fixed to lid of cold box. Incident protons Sensors Ni foils 16

17. Frames fixed to top lid of box (side view; lid upside down) Beam collimator 17

18. Looking downstream, side view of frames, attached to lid of cold box. Lid of cold box sides of cold box Incident protons 18

19. Looking upstream, side view of frames, attached to lid of cold box. Al plate, downstream of sensors Nitrogen gas pipe Frame with Ni foils 19

20. Inside cold box: nitrogen inlet pipe + polystyrene packing. 20 Upstream window of cold box Length of pipe in cold box to ensure to cool nitrogen sufficiently.

21. Sensor frame with Gafchromic film attached. 21

22. Sensor frame with Gafchromic film after exposure to beam burst. Beam spot in HOME position Y_offset X_offset 22

23. Scale, sizes. 23