12.
12.1 Beam Uniformity

2D map of beam at entrance to HRMA.

Accuracy: 5%.

Needed to make accurate measurement of effective area

N.A.

25 energies

100x(1400/5)x25 = 194 hrs

2D beam mapper on HXDS, XGA

12.2 Guide Tube Scattering

Measure angular distribution and spectrum of x-rays that hit the HRMA after scattering from the walls and/or baffles of the guide tube.
Accuracy:

N.A.

2 energies

TBD

High Speed Imager & an x-ray optical system such as TMA or S056.

12.3 Filter Absorption

Measure the x-ray absorption of 27 filters in the XGA (see Table 15 ). Need beam monitor in front of filter.
Accuracy: 0.5%

Needed for correct fitting of spectral shapes in x-ray detector data.

N.A.

3 energies

TBD

BND solid state spectrometer

12.4 X-ray source properties

12.4.1

Anode Voltage

Measure accelerating voltage on electron gun, vs. emission current over full range.
Accuracy: 100V.

Assure that the electron beam energy is correct and stable.

12.4.2

Spectrum

Measure the spectral shape, from each distinct operational configuration of the XGA
Accuracy: 1% per keV

To assure that there is sufficient intensity and energy range coverage

N.A.

25 targets for HEXGA, also for LEXGA

TBD

FMS, BND spectrometer

12.4.3

Spectral intensity

(including 100:1 dynamic range) from each distinct operational configuration of the XGA.
Accuracy: 10%

N.A.

25 targets for HEXGA, also for LEXGA

12.4.4

Time stability

of the flux from each distinct operational configuration of the XGA
Accuracy: 5%.

12.4.5

Anode HV stability

from each distinct operational configuration of the XGA, to assure that the bremsstrahlung end point remains unchanged.
Accuracy: 5%

12.4.6

Brightness distribution

Record pinhole camera images of the spot distributions from each distinct operational configuration of the XGA.
Accuracy: 0.05 mm on spot size

To assure that the source size is small enough.

High Speed Imager

12.4.7

Polarization

Measure the polarization of the XGA
Accuracy: 5%

FMS

12.5 HXDS Properties

12.5.1

Angular Resolution

12.5.2

Data taking speed

12.5.3

Counting Rate Capability

Flux measuring accuracy vs. counting rate.

12.5.4

Positioning accuracy

12.5.5

Beam centering accuracy

12.5.8

Detector backgrounds

12.5.9

Detector spectral resolution

12.6 Scattered LIght Source Properties

12.6.1

UV source

12.7 Stray light from XGA

Effect of UV on HRC & ACIS, effect of visible on ACIS