Abstract

We present analysis results for off-nominal features such as Si flourescence and escape peak positions and effciencies in ACIS front and back-illuminated devices. Data for front illuminated devices were obtained by the ACIS IPI team in Synchrotron measurements at Bessy as well as in house subassembly calibration measurements at MIT. The efficiencies and positions presented here then were derived from first generation eventlists obtained from the ACIS model simulator version from July 1998. For the back-illuminated devices only in house subassembly calibration data are available. Since the development of the ACIS model simulator for these devices is still under way, as a first step we present positions of off-nominal feature in w134c4r (S3) and w140c4r (S1).

Introduction

Front-illuminated Devices

Figure 1: Escape and flourescence efficiencies as measured at the synchrotron storge ring at Bessy using a reference device (w102c3), from Prigoshin et al. 1998.

Figure 2: The pulse height (PHA) spectrum of node 0 of device w182c4r in S2 for the Ge-K source (NOTE: this spectrum will ultimately be replace by the Mn-K line spectrum with full legend).

Table 1: Main and off-nominal peak positions for node 0 of w182c4r

Table 2: Main and off-nominal peak positions for node 1 of w182c4r

Table 3: Main and off-nominal peak positions for node 2 of w182c4r

Table 4: Main and off-nominal peak positions for node 3 of w182c4r

Table 5: ASCA grade 0 main and off-nominal peak positions for FI devices from first generation eventlists generated by the ACIS simulator.

Table 6: Standard ASCA grade set 02346 main and off-nominal peak positions for FI devices from first generation eventlists generated by the ACIS simulator.

Back-illuminated Devices

w134c4r in S3

Table 7: Main and off-nominal peak positions for node 0 of w134c4r

Table 8: Main and off-nominal peak positions for node 1 of w134c4r

Table 9: Main and off-nominal peak positions for node 2 of w134c4r

Table 10: Main and off-nominal peak positions for node 3 of w134c4r

w140c4r in S1

Table 11: Main and off-nominal peak positions for node 0 of w140c4r

Table 12: Main and off-nominal peak positions for node 1 of w140c4r

Table 13: Main and off-nominal peak positions for node 2 of w140c4r

Table 14: Main and off-nominal peak positions for node 3 of w140c4r

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