Photon Harp Scans

Photon harp scans that were taken during the running of the experiment serve to define the photon beam profile. This profile is then used in the Monte Carlo simulation of the experiment.

Figure 11: Fits to photon harp scan data.

Figure 11 displays two typical fits to the harp data, while Figure 12 proves that assumed functional form for the beam profile is quite stable across the running period. Data used for the fits were taken with high statistic PMT.

Figure 12: Beam profile parametrization stability.

Table 2: Fit parameters for the $x$ coordinate. Magnitudes, $A_1$, $A_2$, $p_0$, are in counts.

Run	Radiator	$A_1$ $\pm\delta A_1$	$x_1\pm\delta x_1$ (mm)	$\sigma_1\pm\delta\sigma_1$ (mm)	$A_2$ $\pm\delta A_2$	$x_2\pm\delta x_2$ (mm)	$\sigma_2\pm\delta\sigma_2$ (mm)	$p_0\pm\delta p_0$
5136	B	248.8 $\pm$ 9.0	10.47 $\pm$ 0.0108	0.40 $\pm$ 0.0183	70.9 $\pm$ 8.6	10.43 $\pm$ 0.0344	1.23 $\pm$ 0.075	16.7 $\pm$ 0.3
5105	C	310.2 $\pm$ 7.7	10.48 $\pm$ 0.0095	0.47 $\pm$ 0.0142	50.8 $\pm$ 6.3	10.38 $\pm$ 0.0492	1.49 $\pm$ 0.100	18.3 $\pm$ 0.4
5105	C	5094.5 $\pm$ 43.1	10.47 $\pm$ 0.0025	0.45 $\pm$ 0.0045	1277.3 $\pm$ 44.0	10.49 $\pm$ 0.0087	1.25 $\pm$ 0.019	345.8 $\pm$ 1.6
5082	B	367.6 $\pm$ 7.8	10.65 $\pm$ 0.0089	0.50 $\pm$ 0.0133	57.9 $\pm$ 6.1	10.61 $\pm$ 0.0489	1.64 $\pm$ 0.097	22.2 $\pm$ 0.4
5024	B	249.4 $\pm$ 8.4	10.73 $\pm$ 0.0111	0.46 $\pm$ 0.0196	54.8 $\pm$ 8.3	10.68 $\pm$ 0.0482	1.40 $\pm$ 0.107	15.6 $\pm$ 0.3
4968	B	550.3 $\pm$ 10.5	10.71 $\pm$ 0.0065	0.40 $\pm$ 0.0097	128.2 $\pm$ 7.6	10.72 $\pm$ 0.0207	1.30 $\pm$ 0.035	6.6 $\pm$ 0.2
4962	B	543.3 $\pm$ 12.2	10.67 $\pm$ 0.0071	0.39 $\pm$ 0.0127	177.0 $\pm$ 11.5	10.75 $\pm$ 0.0171	1.18 $\pm$ 0.032	8.8 $\pm$ 0.2
4949	B	503.0 $\pm$ 9.0	10.66 $\pm$ 0.0070	0.46 $\pm$ 0.0113	89.3 $\pm$ 7.2	10.72 $\pm$ 0.0272	1.52 $\pm$ 0.058	5.6 $\pm$ 0.2
4941	B	573.8 $\pm$ 7.0	11.35 $\pm$ 0.0047	0.46 $\pm$ 0.0077	113.6 $\pm$ 5.5	11.36 $\pm$ 0.0168	1.46 $\pm$ 0.032	6.9 $\pm$ 0.1
4893	B	341.1 $\pm$ 8.4	10.93 $\pm$ 0.0067	0.40 $\pm$ 0.0134	103.2 $\pm$ 9.2	10.92 $\pm$ 0.0193	1.15 $\pm$ 0.046	21.5 $\pm$ 0.2
4892	B	1657.1 $\pm$ 17.4	10.68 $\pm$ 0.0030	0.41 $\pm$ 0.0050	499.6 $\pm$ 16.6	10.69 $\pm$ 0.0093	1.16 $\pm$ 0.018	112.0 $\pm$ 0.8
4880	B	692.0 $\pm$ 7.7	11.63 $\pm$ 0.0042	0.45 $\pm$ 0.0064	141.4 $\pm$ 5.5	11.65 $\pm$ 0.0148	1.46 $\pm$ 0.026	7.9 $\pm$ 0.1
4870	B	1105.6 $\pm$ 8.6	10.71 $\pm$ 0.0044	0.58 $\pm$ 0.0039	44.3 $\pm$ 2.0	10.97 $\pm$ 0.1806	2.45 $\pm$ 0.132	485.7 $\pm$ 1.6
4847	D	285.1 $\pm$ 4.4	15.71 $\pm$ 0.0076	0.52 $\pm$ 0.0101	34.7 $\pm$ 2.1	16.79 $\pm$ 0.4943	3.02 $\pm$ 0.435	34.2 $\pm$ 0.4
4717	A	1019.6 $\pm$ 12.8	10.83 $\pm$ 0.0039	0.44 $\pm$ 0.0067	265.7 $\pm$ 12.4	10.83 $\pm$ 0.0137	1.27 $\pm$ 0.028	78.8 $\pm$ 0.5
4645	A	927.7 $\pm$ 12.8	10.77 $\pm$ 0.0042	0.43 $\pm$ 0.0069	245.5 $\pm$ 12.3	10.76 $\pm$ 0.0149	1.25 $\pm$ 0.030	88.3 $\pm$ 0.5
4577	A	1014.9 $\pm$ 12.6	10.81 $\pm$ 0.0040	0.46 $\pm$ 0.0071	233.7 $\pm$ 12.5	10.82 $\pm$ 0.0163	1.37 $\pm$ 0.037	97.9 $\pm$ 0.6
4576	A	1063.8 $\pm$ 13.9	10.88 $\pm$ 0.0038	0.42 $\pm$ 0.0066	280.1 $\pm$ 13.8	10.89 $\pm$ 0.0133	1.23 $\pm$ 0.030	97.5 $\pm$ 0.6
4535	A	1014.9 $\pm$ 12.3	10.81 $\pm$ 0.0037	0.42 $\pm$ 0.0065	219.9 $\pm$ 11.8	10.86 $\pm$ 0.0167	1.30 $\pm$ 0.036	92.2 $\pm$ 0.6
4479	B	290.2 $\pm$ 7.2	10.83 $\pm$ 0.0072	0.41 $\pm$ 0.0127	79.2 $\pm$ 7.1	10.78 $\pm$ 0.0253	1.22 $\pm$ 0.055	26.7 $\pm$ 0.3
4437	B	504.6 $\pm$ 9.2	10.98 $\pm$ 0.0054	0.41 $\pm$ 0.0099	122.3 $\pm$ 8.9	11.02 $\pm$ 0.0239	1.33 $\pm$ 0.056	67.4 $\pm$ 0.5
4434	B	441.1 $\pm$ 10.5	8.87 $\pm$ 0.0060	0.34 $\pm$ 0.0101	168.2 $\pm$ 10.1	8.91 $\pm$ 0.0170	1.06 $\pm$ 0.033	73.7 $\pm$ 0.4
4307	B	403.0 $\pm$ 10.5	13.84 $\pm$ 0.0066	0.38 $\pm$ 0.0121	148.3 $\pm$ 10.8	13.84 $\pm$ 0.0195	1.12 $\pm$ 0.041	71.2 $\pm$ 0.5
4289	D	460.0 $\pm$ 10.1	13.85 $\pm$ 0.0063	0.41 $\pm$ 0.0106	135.9 $\pm$ 10.0	13.82 $\pm$ 0.0226	1.22 $\pm$ 0.045	81.6 $\pm$ 0.5
3605	B	215.4 $\pm$ 5.3	15.19 $\pm$ 0.0076	0.40 $\pm$ 0.0141	58.0 $\pm$ 4.9	15.17 $\pm$ 0.0236	1.29 $\pm$ 0.053	4.0 $\pm$ 0.1

Table 3: Fit parameters for the $y$ coordinate. Magnitudes, $A_1$, $A_2$, $p_0$, are in counts.

Run	Radiator	$A_1$ $\pm\delta A_1$	$x_1\pm\delta x_1$ (mm)	$\sigma_1\pm\delta\sigma_1$ (mm)	$A_2$ $\pm\delta A_2$	$x_2\pm\delta x_2$ (mm)	$\sigma_2\pm\delta\sigma_2$ (mm)	$p_0\pm\delta p_0$
5136	B	265.8 $\pm$ 9.4	25.43 $\pm$ 0.0102	0.37 $\pm$ 0.0163	83.4 $\pm$ 8.7	25.51 $\pm$ 0.0300	1.18 $\pm$ 0.0586	16.7
5105	C	293.5 $\pm$ 9.7	25.42 $\pm$ 0.0102	0.42 $\pm$ 0.0173	80.8 $\pm$ 9.6	25.38 $\pm$ 0.0323	1.20 $\pm$ 0.0613	18.3
5105	C	5174.0 $\pm$ 40.5	25.40 $\pm$ 0.0024	0.40 $\pm$ 0.0041	1480.5 $\pm$ 39.1	25.39 $\pm$ 0.0074	1.21 $\pm$ 0.0145	345.8
5082	B	365.2 $\pm$ 10.1	25.43 $\pm$ 0.0089	0.41 $\pm$ 0.0141	103.5 $\pm$ 9.0	25.42 $\pm$ 0.0281	1.25 $\pm$ 0.0509	22.2
5024	B	251.3 $\pm$ 8.0	25.54 $\pm$ 0.0106	0.40 $\pm$ 0.0163	70.7 $\pm$ 6.9	25.58 $\pm$ 0.0344	1.30 $\pm$ 0.0612	15.6
4968	B	559.1 $\pm$ 10.4	25.53 $\pm$ 0.0067	0.44 $\pm$ 0.0111	128.4 $\pm$ 8.7	25.56 $\pm$ 0.0214	1.35 $\pm$ 0.0387	6.6
4962	B	593.5 $\pm$ 11.3	24.51 $\pm$ 0.0063	0.38 $\pm$ 0.0092	161.1 $\pm$ 7.9	24.55 $\pm$ 0.0183	1.28 $\pm$ 0.0281	8.8
4949	B	483.6 $\pm$ 9.8	25.71 $\pm$ 0.0072	0.43 $\pm$ 0.0119	119.7 $\pm$ 8.0	25.69 $\pm$ 0.0219	1.35 $\pm$ 0.0383	5.6
4941	B	573.8 $\pm$ 7.3	25.61 $\pm$ 0.0046	0.42 $\pm$ 0.0071	133.5 $\pm$ 5.4	25.62 $\pm$ 0.0147	1.38 $\pm$ 0.0245	6.9
4893	B	285.2 $\pm$ 7.7	25.19 $\pm$ 0.0075	0.40 $\pm$ 0.0154	93.6 $\pm$ 8.6	24.99 $\pm$ 0.0284	1.14 $\pm$ 0.0441	21.5
4892	B	1771.4 $\pm$ 16.1	25.37 $\pm$ 0.0029	0.42 $\pm$ 0.0049	456.1 $\pm$ 15.6	25.37 $\pm$ 0.0098	1.24 $\pm$ 0.0190	112.0
4880	B	724.9 $\pm$ 7.9	25.32 $\pm$ 0.0041	0.45 $\pm$ 0.0068	145.4 $\pm$ 6.1	25.36 $\pm$ 0.0146	1.46 $\pm$ 0.0269	7.9
4870	B	983.1 $\pm$ 16.7	25.29 $\pm$ 0.0050	0.41 $\pm$ 0.0083	274.1 $\pm$ 16.5	25.43 $\pm$ 0.0245	1.27 $\pm$ 0.0414	485.7
4847	D	293.3 $\pm$ 5.9	26.48 $\pm$ 0.0070	0.46 $\pm$ 0.0143	48.1 $\pm$ 6.1	26.40 $\pm$ 0.0467	1.72 $\pm$ 0.1443	34.2
4717	A	1034.6 $\pm$ 12.5	25.55 $\pm$ 0.0040	0.47 $\pm$ 0.0068	256.7 $\pm$ 12.3	25.55 $\pm$ 0.0144	1.33 $\pm$ 0.0281	78.8
4645	A	758.3 $\pm$ 16.4	25.52 $\pm$ 0.0050	0.40 $\pm$ 0.0088	308.7 $\pm$ 17.2	25.53 $\pm$ 0.0117	1.01 $\pm$ 0.0223	88.3
4577	A	1000.7 $\pm$ 13.7	25.59 $\pm$ 0.0040	0.41 $\pm$ 0.0069	297.6 $\pm$ 13.7	25.60 $\pm$ 0.0128	1.21 $\pm$ 0.0255	97.9
4576	A	1012.5 $\pm$ 14.7	25.68 $\pm$ 0.0041	0.41 $\pm$ 0.0071	306.6 $\pm$ 15.1	25.73 $\pm$ 0.0125	1.15 $\pm$ 0.0248	97.5
4535	A	991.8 $\pm$ 13.3	25.55 $\pm$ 0.0040	0.43 $\pm$ 0.0071	258.6 $\pm$ 13.6	25.57 $\pm$ 0.0143	1.24 $\pm$ 0.0295	92.2
4479	B	295.5 $\pm$ 6.7	25.51 $\pm$ 0.0071	0.40 $\pm$ 0.0114	80.9 $\pm$ 6.2	25.50 $\pm$ 0.0249	1.22 $\pm$ 0.0445	26.7
4437	B	434.4 $\pm$ 10.2	25.41 $\pm$ 0.0061	0.34 $\pm$ 0.0101	177.1 $\pm$ 9.9	25.41 $\pm$ 0.0157	1.04 $\pm$ 0.0282	67.4
4434	B	494.3 $\pm$ 9.4	25.46 $\pm$ 0.0056	0.38 $\pm$ 0.0092	143.7 $\pm$ 8.8	25.44 $\pm$ 0.0205	1.23 $\pm$ 0.0392	73.7
4307	B	400.5 $\pm$ 11.1	25.39 $\pm$ 0.0072	0.42 $\pm$ 0.0135	133.1 $\pm$ 12.0	25.40 $\pm$ 0.0224	1.17 $\pm$ 0.0470	71.2
4289	D	409.1 $\pm$ 11.1	25.39 $\pm$ 0.0068	0.34 $\pm$ 0.0106	199.7 $\pm$ 10.9	25.42 $\pm$ 0.0151	0.98 $\pm$ 0.0244	81.6
3605	B	226.6 $\pm$ 5.0	24.13 $\pm$ 0.0075	0.41 $\pm$ 0.0134	57.4 $\pm$ 4.5	24.15 $\pm$ 0.0232	1.32 $\pm$ 0.0471	4.0