HRC flat field summary

HRC flat field measurements

**HRC-I pre-HVPS fix [21-23 May 1997] flat field summary**
line	energy	M HV	V_th	X HV	I_E	P	T	gas	window	A_G	T_M	T_W	QE_MD	counts	time	rate	HRC file	MCA file	b_time	b_cts	b_rate	b_HRC	b_MCA
B K	183	79, 91 77, 88	32	0.80	513 495	310.0 309.5	296	CH₄	S0464	0.945	0.60	0.813	0.46	628592 601914	10000 10000	62.86 60.19	p197052110^* p197052208	70521m10 70522m08	1000 1000	716 694	0.72 0.69	p197052109 p197052207	70521m09 70522m07
C K	277	79, 91	32	1.00	55	309.2	294	CH₄	S0464	0.647	0.60	0.483	0.19	471869	7000	67.41	p1970521c	70521m02	1000	757	0.76	p1970521b	70521m0b
O K	525	79, 91 77, 88	32	1.00	364 409	310.0	296	CH₄	S0464	0.993	0.60	0.717	0.43	2043798 2267167	7200 7200	283.86 314.88	p197052106 p197052212	70521m06 70522m12	1000 1000	707 774	0.71 0.77	p197052105 p197052211	70521m05 70522m11
Ni L	852	79, 91	32	2.00	20	258.2	296	P10	S0456	0.995	0.85	0.700	0.59	910261	7200	126.43	p197052304	70523m04	1000	544	0.54	p197052303	70523m03
Al K	1487	79, 91 77, 88	32	4.00	32 36	309.2	295	P10	S0464	0.767	0.60	0.976	0.45	695121 757761	8498 8500	81.80 89.15	p197052204 p197052205	70522m04 70522m05	1000	754	0.75	p197052203	70522m03
Ag L	2984	79, 91	32	6.00	41	614.0	295	P10	S0456	0.361	0.85	0.976	0.30	1137436	8000	142.18	p197052308	70523m08	1000	527	0.53	p197052307	70523m07
Ti K	4511	79, 91 77, 88	32	10.0	129 128	308.0 310.0	294 295	P10	S0456	0.513 0.514	0.85	0.993	0.43	1473128 1460104	7200 7200	204.60 202.79	p197052312 p197052313	70523m12 70523m13^**	1000	521	0.52	p197052311	70523m11
Fe K	6404	79, 91	32	10.0	97	614.2	295	P10	S0456	0.424	0.85	0.997	0.36	923855	7200	128.31	p197052317	70523m17	1000	553	0.55	p197052316	70523m16
^p197052110.rd is absent from the HRC data archive. ^* The source HV was turned off about 100 seconds before MD timed out, resulting in an additional 1-2% uncertainty in time and rate.

**HRC-I post-HVPS fix [13-14 June 1997] flat field summary**
line	energy	M HV	V_th	X HV	I_E	P	T	gas	window	A_G	T_M	T_W	QE_MD	counts	time	rate	HRC file	MCA file	b_time	b_cts	b_rate	b_HRC	b_MCA
B K	183	79, 91	8	0.80	436	309.5	299	CH₄	S0464	0.943	0.60	0.813	0.46	174367	7200	24.22	p197061313	70613m13	100	56	0.56	p197061314^*	70613m14
C K	277	79, 91	8	1.00	44	310.0	297	CH₄	S0464	0.644	0.60	0.483	0.19	180450	7200	25.06	p197061304	70613m04	1000	647	0.65	p197061303	70613m03
O K	525	79, 91	8	1.00	303	310.0	297	CH₄	S0464	0.993	0.60	0.717	0.43	1322268	7200	183.65	p197061310	70613m10	---	---	---	---	---
Ni L	852	79, 91	8	2.00	12	259.0	299	P10	S0456	0.995	0.85	0.700	0.59	681516	7200	94.66	p197061317	70613m17	100	44	0.44	p197061318^*	70613m18
Al K	1487	79, 91	8	4.00	34	310.0	297	P10^**	S0464	0.766	0.60	0.976	0.45	189445	7200	26.31	p197061307	70613m07	---	---	---	---	---
Ag L	2984	79, 91	8	6.00	41	614.5	298	P10	S0456	0.359	0.85	0.976	0.30	853578	7200	118.55	p197061404	70614m04	1000	548	0.55	p197061403	70614m03
Ti K	4511	79, 91	8	10.0	110	310.0	299	P10	S0456	0.509	0.85	0.993	0.43	1324543	7200	183.96	p197061321	70613m21	100	60	0.60	p197061322^*	70613m22
Fe K	6404	79, 91	8	10.0	85	614.5	298	P10	S0456	0.421	0.85	0.997	0.36	858769	7200	119.27	p197061407	70614m07	---	---	---	---	---
^p197061314.rd, p197061318.rd, and p197061322.rd are absent from the HRC data archive. ^*Data sheets list the monitor detector gas as P10. The 70613m07.chn header lists the gas as CH₄.

**HRC-S pre-HVPS fix [26 May - 1 June 1997] flat field summary**
line	energy	MCP	M HV	V_th	X HV	I_E	P	T	gas	window	A_G	T_M	T_W	QE_MD	counts	time	rate	HRC file	MCA file	b_time	b_cts	b_rate	b_HRC	b_MCA
B K	183	0 0 0 +1 -1	90, 102 87, 98 87, 98 90, 102 90, 102	40	0.80	513 506 497 459 437	308.1 308 308 308.5 308.7	296 295 295 295 298	CH₄	S0464	0.940 0.944 0.944 0.945 0.943	0.60	0.813	0.46	1213247 462257 478181 219512 516711	25000 11600 13000 7000 18000	48.530 38.698 36.783 31.359 28.706	p197052606 p197052702 p197052703 p197053011 p197060124	70526m06 70527m02 70527m03 70530m11 70601m24	1000 1000 1000 1000	703 734 871 864	0.70 0.73 0.87 0.86	p197052605 p197052701 p197053007 p197060123	705226m05 70527m01 70530m07 70601m23
C K	277	0 0 +1 +1 -1 -1	90, 102 87, 98 90, 102 87, 98 90, 102 87, 98	40	1.00	273 403 353 653 275 436	308.1 308.3 308.7 308.5 308 308	296 296 297 297 298 298	CH₄	S0464	0.644	0.60	0.483	0.19	470325 697495 443840 865208 509507 823021	1500 1500 1500 1500 2000 2000	313.55 464.00 295.89 576.81 254.75 411.51	p197052708 p197052710 p197053017 p197053019 p197060113 p197060110	70527m08 70527m10 70530m17 70530m19 70601m13 70601m10	1000 1000 1000 1000 1000	741 758 662 717 739	0.74 0.76 0.62 0.72 0.74	p197052707 p197052709 p197053015 p197053018 p197060111 p197060108	70527m07 70527m09 70530m15 70530m18 70601m11 70601m09
O K	525	0 0 +1 +1 -1 -1	90, 102 87, 98 90, 102 87, 98 90, 102 87, 98	40	1.00	730 728 775 773 648 649	308.3 308.2 308.7 308.6 308.5 308.5	296 296 297 297 298 298	CH₄	S0464	0.993	0.60	0.717	0.43	1562098 2389722 1757142 2787799 1944125 1943827	3000 4500 2500 4000 4500 4500	520.70 531.05 702.86 696.95 432.03 431.96	p197052716 p197052714 p197053026 p197053024 p197060116 p197060119	70527m16 70527m14 70530m26 70530m24 70601m17 70601m19	1000 1000 200 1000 1000	746 762 191 862 895	0.75 0.76 0.96 0.86 0.90	p197052715 p197052713 p197053020 p197060115 p197060117	70527m15 70527m13 70530m23 70601m16 70601m18
Ni L	852	0 0	90, 102 87, 98	40	2.00	89 163	257.1 257.3	296 ???	P10	S0456	0.995	0.85	0.700	0.59	1292473 1817516	2000 2000	646.24 908.76	p197052821 p197052819	70528m21 70528m19	1000 1000	593 558	0.59 0.56	p197052820 p197052818	70528m20 70528m18
Al K	1487	0 0 +1 +1 -1 -1	90, 102 87, 98 90, 102 87, 98 90, 102 87, 98	40	4.00	219 295 189 358 186 249	308.4 308.5 308.5 308.5 308.5 308.5	296	P10	S0464	0.767	0.60	0.976	0.45	1090069 1438501 843752 1488628 835704 1089665	2000 2000 2000 2000 2000 2000	545.03 719.25 421.88 744.31 417.85 544.83	p197052807 p197052810 p197053108 p197053105 p197060104 p197060106	70528m07 70528m10 70531m08 70531m05 70601m04 70601m06	1000 1000 1000	659 765 659	0.66 0.77 0.66	p197052805 p197052811 p197053107 p197053103 p19706010e p197060105	70528m05 70528m11 70531m03 70601m03
Ag L	2984	0 0	90, 102 87, 98	40	6.00	296 386	612.5 612.5	296 296	P10	S0456	0.359	0.85	0.976	0.30	1751385	2000	875.69	p197052910 p197052907	70529m10 70529m07	1000	559	0.56	p197052911 p197052908	70529m08
Ti K	4511	0 0	90, 102 87, 98	40	10.0	812 819	308.3 308.3	296 ???	P10	S0456	0.511	0.85	0.993	0.43	2900295 2987758	2000 2000	1450.15 1493.88	p197052828 p197052832	70528m28 70528m32	1000 1000	542 572	0.54 0.57	p197052826 p197052830	70528m26 70528m30
Fe K	6404	0 0	90, 102 87, 98	40	10.0	558 561	612.5 612.5	296 296	P10	S0456	0.422	0.85	0.997	0.36	1543952 1540994	2000 2000	771.98 770.50	p197052914 p197052917	70529m14 70529m17	1000	562	0.56	p197052916	70529m15

**HRC-S post-HVPS fix [10-15 June 1997] flat field summary**
line	energy	MCP	M HV	V_th	X HV	I_E	P	T	gas	window	A_G	T_M	T_W	QE_MD	counts	time	rate	HRC file	MCA file	b_time	b_cts	b_rate	b_HRC	b_MCA
B K	183	0 +1 -1	90, 102	8	0.80	453 456 439	308.5 308.5 309.0	296 296 296	CH₄	S0464	0.944	0.60	0.813	0.46	523078 503838 462935	18000	29.06 27.99 25.72	p197061024 p197061116 p197061216	70610m24 70611m16 70612m16	1000	604 599 543	0.60 0.60 0.54	p197061023 p197061115 p197061215	70610m23 70611m15 70612m15
C K	277	0 +1 -1	90, 102	8	1.00	179 230 257	308.5 308.5 309.0	296 296 297	CH₄	S0464	0.644	0.60	0.483	0.19	226668 304967 330133	2000	113.33 152.48 165.06	p197061012 p197061104 p197061204	70610m12 70611m04 70612m04	1000	612 669 626	0.61 0.67 0.63	p197061011 p197061103 p197061203	70610m11 70611m03 70612m03
O K	525	0 +1 -1	90, 102	8	1.00	643 646 647	308.5 308.5 309.0	296 298 297	CH₄	S0464	0.993	0.60	0.717	0.43	1215415 1227629 1245050	3000	405.14 409.21 415.02	p197061020 p197061112 p197061212	70610m20 70611m12 70612m12	1000	632 639 573	0.63 0.64 0.57	p197061019 p197061111 p197061211	70610m19 70611m11 70612m11
Ni L	852	0	90, 102	8	2.00	60	257.6	296	P10	S0456	0.995	0.85	0.700	0.59	990270	2000	495.14	p197061516	70615m16	1000	510	0.51	p197061515	70615m15
Al K	1487	0 +1 -1	90, 102	8	4.00	182 176 207	308.5 308.5 309.0	296 298 297	CH4	S0464	0.256	0.60	0.976	0.15	293902 276214 323155	2000	146.95 138.11 161.58	p197061016 p197061108 p197061208	70610m16 70611m08 70612m08	1000	682 673 673	0.68 0.67 0.67	p197061015 p197061107 p197061207	70610m15 70611m07 70612m07
Ag L	2984	0	90, 102	8	6.00	226	613.0	296	P10	S0456	0.359	0.85	0.976	0.30	1402442	2000	701.22	p197061508	70615m08	1000	575	0.58	p197061507	70615m07
Ti K	4511	0	90, 102	8	10.0	629	308.7.0	296	P10	S0456	0.511	0.85	0.993	0.43	2296465	2000	1148.2	p197061512	70615m12	1000	553	0.55	p197061511	70615m11
Fe K	6404	0	90, 102	8	10.0	491	613.0	296	P10	S0456	0.422	0.85	0.997	0.36	1362534	2000	0.58	p197061504	70615m04	1000	568	0.57	p197061503	70615m03

Comparison of flat fields

**Fixed values for both sets of measurements**
solid angle subtended by the monitor aperture	5.88 × 10^-6 steradians
distance: source to MCP front surface	654.9 cm
MCP area: CsI coated region total open area	81.0 cm² 86.5 cm²
solid angle subtended by MCP (open area)	2.02 × 10^-4 steradians
monitor depth	2.05 cm

line	The x-ray emission line selected for this run. The O anode is Mg(OH)₂. The B anode is B on Mg.
energy	primary emission line energy (eV)
MCP	MCP segment number of the HRC-S
M HV	HV step setting on the [top, bottom] plate of the MCP: [79, 91] are the flight settings; [77, 88] are the XRCF settings.
V_th	MCP threshold voltage step setting: 32 is the value used at XRCF; 8 is the flight setting.
X HV	X-ray source HV (kV)
I_E	Manson source emission current (µA)
P	gas pressure inside the monitor FPC (Torr)
T	laboratory temperature (K)
gas	gas used in the monitor
window	ID for the window on the monitor: S0464 is VYNS and S0456 is polypropylene.
A_G	gas absorption in the monitor, based on the x-ray photoabsorption data of Henke, Gullikson and Davis (1993) for all energies except C K (277 eV) which is taken from Henke et al. (1982).
T_M	transmission of the monitor aperture mesh
T_W	transmission of the monitor aperture window
QE_MD	overall monitor detector quantum efficiency, A_G × T_M × T_W
counts	integrated number of counts in the monitor (all channels)
time	fpc live time for the data run (s) The MCP live time depends on the MCP dead time per event.
rate	counts ÷ time (counts/s)
HRC file	file containing the HRC data (*.rd)
MCA file	file containing the monitor data (*.chn)
b_time	live time for the background run (s)
b_cts	monitor background counts
b_rate	b_cts ÷ b_time (counts/s)
b_HRC	file containing HRC background run data (*.rd)
b_MCA	file containing monitor background run data (*.chn)

This page last updated: 5 January 1999
maintained by: Charles Wilton