Fluke 90100 manual Appendix

Appendix

Using Build-Up A

Table A-2. Recommended Amount of Build-up to Use With the Model 35300A Detector to Attain Electrons dmax for Linear Accelerators. 37051C-1 Plates are 0.44 cm Each

Nominal	Number of build-up	"Solid Water"
Accelerator Potential,	plates
		thickness (cm)
MeV	(37051C-1)
2	1	0.5
3	1	0.5
4	1	0.5
5	2	1.0
6	2	1.0
7	3	1.5
8	3	1.5
9	4	2.0
10	5	2.0
11	5	2.5
12	6	3.0
13	6	3.0
14	7	3.5
15	7	3.5
16	8	4.0
17	8	4.0
18	9	4.5
19	10	4.5
20	10	5.0
21	11	5.5
22	11	5.5
23	12	6.0
24	12	6.0
25	13	6.0

The amount of underside build-up to be used depends on how closely you wish to approximate the back- scattering of a water bath or other test set-up. Generally, several inches are used: about eight 37051C-1 plates (or about 4.0 cm of "Solid Water") regardless of the incident energy shown in the tables.

A-3