post-XRCF HRC-I MCP+UVIS Quantum Efficiency

HRC-I pre-HVPS fix QE(E)
XRCF threshold voltage

line	energy	QEBND	BND	MCP HV	RMCP			RMD		RBND	QEMCP
					open	coated	central	with MCP	with BND		open	coated	central
B K	183	0.459	2.79 × 10-6	flight XRCF			31.7	59.50	25.43	20.41			0.035 ± 0.001
C K	277	0.184	2.79 × 10-6	flight
O K	525	0.427	2.79 × 10-6	flight XRCF			159.1	314.11	247.66	98.42			0.086 ± 0.002
Ni L	852	0.592	7.82 × 10-6	flight
Al K	1487	0.444	2.79 × 10-6	flight XRCF			155.3	88.40	433.20	205.69			0.22 ± 0.02
Ag L	2984	0.294	7.82 × 10-6	flight
Ti K	4511	0.425	7.82 × 10-6	flight XRCF			134.5	202.27	152.65	184.85			0.104 ± 0.004
Fe K	6404	0.354	7.82 × 10-6	flight

HRC-I post-HVPS fix QE(E)
flight threshold voltage, flight HV

line	energy	QEBND	BND	RMCP			RMD		RBND	QEMCP			HRC team QE
				open	coated	central	with MCP	with BND		open	coated	central
B K	183	0.459	2.79 × 10-6	187.3	171.8	23.76	23.66	24.95	22.54	0.056	0.054	0.058 ± 0.001	0.063
C K	277	0.184	2.79 × 10-6	1431.8	1333.5	184.7	24.41	127.8	97.83	0.195	0.194	0.207 ± 0.002	0.203
O K	525	0.427	2.79 × 10-6	1482.5	1416.9	199.7	183.2	119.0	50.99	0.111	0.114	0.124 ± 0.002	0.119
Ni L	852	0.592	2.79 × 10-6	1415.6	1362.2	195.1	94.22	84.69	40.74	0.255	0.263	0.290 ± 0.05	0.280
Al K	1487	0.146	2.79 × 10-6	1468.1	1418.7	196.7	25.81	460.01	189.74	0.278	0.287	0.307 ± 0.02	0.309
Ag L	2984	0.253	2.79 × 10-6	1503.6	1436.9	204.9	118.0	115.6	67.73	0.076	0.078	0.085 ± 0.02
Ti K	4511	0.405	2.79 × 10-6	1467.8	1397.5	195.4	183.4	185.7	84.92	0.098	0.100	0.107 ± 0.004	0.109
Fe K	6404	0.348	2.79 × 10-6	1515.6	1449.3	201.2	118.8	116.0	52.28	0.136	0.139	0.149 ± 0.006	0.148
plot of results

MCP: total open area CsI coated area central region	2.02 × 10-4 steradians 1.89 × 10-4 steradians 2.45 × 10-5 steradians
MCP dead time	68.5 µs/event

line	atomic transition used to generate x-rays
energy	peak energy of emission line (eV)
QEBND	calculated quantum efficiency of the BND flow proportional counter, taken from cross calibration table
BND	solid angle subtended by the BND during the cross calibration measurements, based on window area and distance from source (steradians)
RMCP	net rate (background subtracted and corrected for dead time) on the MCP during flat field measurements (counts/second)
open	total open region of the MCP. Due to vignetting during the pre-fix data runs, pre-fix values for the open region are not included.
coated	CsI coated region of the MCP. Due to vignetting during the pre-fix data runs, pre-fix values for the coated region are not included.
central	square region occupying central 12.1% of the total open region
RMD	net rate (background subtracted) on the monitor detector flow proportional counter during flat field ("with MCP") and cross calibration ("with BND") measurements (counts/second). Pre-fix flat fields are calibrated using cross calibrations made 3-5 June. Post-fix flat fields are calibrated using cross calibrations made on 12, 17 June
RBND	net rate (background subtracted) on the BND during cross calibration measurements
QEMCP	MCP+UVIS quantum efficiency, calculated using