Table 5: HRMA/LETG/HXDS
|
Test Name, Description and Accuracy Requirement
(  1 
)
|
Justification
|
Off-axis
angles
|
Focal Plane Included Angles (radius)
|
T, °C
|
Energy Sampling Interval ( E)
|
Estimated Integration Time
|
Detector
|
3.
3.1 Vignetting
|
|
X, Y & Z axes. Out of focus x-ray images will be used to measure vignetting due to X, Y and Z axis misalignment. Assume 27 alignment trials, with 10 min alotted for each change of alignment.
Accuracy: 0.5 mm for Y,Z, 0.3 mm for X.
|
Required for alignment
|
on-axis
|
3 positions
|
nominal
|
Al K
|
3.1.1
27
[hsiimage(20, 18, 1, 1, 1)] +26[600] = {[(5.5+20+1.6 x18)]}x27+26x600 = 4.7 hr
|
HSI, BND(FPCs, SSS), FMS
|
3.2 R, PSF
|
|
On-axis response
Use beamceny: 20 point 1-D scans.
Accuracy: 2%(??)
|
Fine details of grating PRF not possible with HRC or ACIS
|
on-axis
|
6 Pinholesa
: 0.1 0.22, 0.6, 1.1, 2.8, 13 arcsec.
|
nominal
|
Al IV 131A
|
3.2.1
6[tm(200) +beamceny(20, 50)] = 6[4.5+1.6x200 +64+3.5x20 x50]= 6.5 hr
|
Scanning photometer, BND(FPCs, SSS), FMS
|
3.3 Find best focus
|
|
Accuracy: 50  m in X
|
Find optimum focus
|
on-axis
|
0, +x1, +x2, -x1, -x2
|
nominal
|
Al IV 131A
|
3.3.1
(50
x
5+4
x
31) = 0.1 hr
|
HSI, BND(FPCs, SSS), FMS
|
3.4 R, PSF
|
|
On-axis response
Use beamceny: 20 point 1-D scans.
Accuracy: 2%(??)
|
Fine details of grating PRF not possible with HRC or ACIS
|
on-axis
|
6 Pinholes: 0.1 0.22, 0.6, 1.1, 2.8, 13 arcsec.
|
nominal
|
Al IV 131A, C K, Al K
|
3.4.1
6[tm(200) +beamceny(20, 50)]
x
3+900
x
2 = 6.5
x
3+0.5 hr = 13.5 hr.
|
Scanning photometer, BND(FPCs, SSS), FMS
|
3.5 Survey for strange edges in mirror/grating response
|
|
Accuracy: 1% in 1000 resolution elements.
|
Molecular contamination search
|
on-axis
|
full imager field, 5 fields of 18 mm each covering a total of 100 mm of dispersed spectrum.
|
nominal
|
bremsstrahlung continuum 0.1 - 3.5 keV
|
3.5.1
(50+50+100+ 500+500)+1
x
5+(4.5 +1.6
x
18
)x
4 = 0.4 hr
|
HSI, BND(FPCs, SSS), FMS
|
3.6 Total Data Acquisition Time for HRMA/LETG/HXDS
|
1.1 days
|
|