The GAs Extraction and Analyses system (GAEA) for immediate extraction and measurements of volatiles in the Hayabusa2 sample container

Earth, Planets and Space

Table 3 Calibration condition, intensities of m/z 28 and 40, and sensitivity of ⁴⁰Ar

Calib. No	Date	Volume of meas.^a	Pressure in QMS^b (Pa)	Amount of ⁴⁰Ar in QMS (cm³STP)	I40 (A)	I28/I40	Sensitivity of ⁴⁰Ar^c (cm³STP/A)
8	7/8/20	PQ-	1.5E−05	4.37E−10	1.02E−12	120	428
9	7/14/20	PQ-	1.5E−05	4.33E−10	1.03E−12	136	421
10 (a)	7/21/20	PQ-	1.5E−05	4.29E−10	6.90E−13	95	621
10 (b)		V2-	3.1E−05	1.00E−09	1.99E−12	111	458
10 (c)		Vga-	6.6E−05	2.65E−09	4.05E−12	106	507
11 (a)	8/18/20	PQ-	1.5E−05	4.25E−10	6.23E−13	82	682
11 (b)		V2-	3.1E−05	9.96E−10	1.72E−12	89	524
11 (c)		V1-	2.5E−05	8.74E−10	1.30E−12	98	559
11 (d)		Vga-	4.4E−05	1.75E−09	2.47E−12	108	512
12	9/16/20	PQ-	1.5E−05	4.21E−10	8.77E−13	140	480
13 (a)		PQ-	6.0E−06	1.73E−10	2.50E−13	69	681
13 (b)		Vga-	3.9E−06	1.55E−10	3.19E−13	239	345
				Average of all data:		116	518
						± 44	± 104
				Average of data on 7/21 and 8/18:		98	540
						± 11	± 77

Terrestrial atmosphere was used as calibration gas. Volume fraction of ⁴⁰Ar is 0.0093
^aVolumes to which calibration gases were introduced for the QMS measurements
PQ-: [V-PQ + V-QMSW], V2-: [V-2 + V-PQ + V-QMSW], V1-: [V-1 + V-2 + V-PQ + V-QMSW], Vga-: [V-Gauge + V-1 + V-2 + V-PQ + V-QMSW]
^bPressures in the QMS during analyses are calculated based on the gas amounts and the volumes shown in Table 1
^cSensitivities are calculated using the average of three measured data around 50–90 s after inlet of gases into the QMS
All sensitivities are corrected as the analytical volume conditions to be [V-PQ + V-QMSW]