Contents


CRIS geometry factors

[CRIS O geometry factors]
Oxygen geometry factor for individual detectors (Range 2-8), and their sum. Dashed line = sum over range 3-8 only.
[CRIS Si geometry factors]
Silicon geometry factor for individual detectors (Range 2-8), and their sum. Dashed line = sum over range 3-8 only.
[CRIS Fe geometry factors]
Iron geometry factor for individual detectors (Range 2-8), and their sum. Dashed line = sum over range 3-8 only.


CRIS functional diagram

[CRIS Event Flow]


CRIS Si(Li) Stack Detector Physical Parameters/Hybrid Gains & Offsets


Figure 1. Drawing of single and double-grooved detectors. Single-groove detectors have only one active area (inside groove) with area 69 cm^2, while double-groove detectors have two active areas (inside inner groove and between grooves) with areas 60 cm^2 and 8 cm^2 respectively. The smaller active area is used as a guard, to identify events having bad or inconsistent geometries.


Figure 2. Schematic of one (of four) CRIS solid-state detector stacks. Detectors E3 through E8 are paired, and their combined signal is output. The signals from the detectors are processed by a 4096-channel pulse-height-analysis system.


Stack A Thickness (µm) Deadlayer (µm) Amplifier Gain (MeV/ch) Offset (ch)
E1 2940 36.5 1.9793 47.6
E2 2980 23.0 1.9854 47.6
E3-1 3006 57.0 3.0619 47.8
E3-2 3002 56.0
E4-1 3020 58.0 3.0337 49.7
E4-2 3021 55.0
E5-1 3016 65.0 3.0590 48.3
E5-2 2991 46.0
E6-1 2947 42.0 3.0598 48.5
E6-2 3007 43.0
E7-1 2966 31.0 2.9992 47.9
E7-2 2963 140.0
E8-1 3064.5 72.5 3.0142 49.0
E8-2 3010 67.0
E9 2944 29.0 0.1334 48.4
Stack B
E1 2989 25.0 2.0090 48.0
E2 3015 57.0 1.9854 47.6
E3-1 2998 48.0 3.0619 47.8
E3-2 3027 67.0
E4-1 2945 39.0 3.0337 49.7
E4-2 2971 51.0
E5-1 2991 54.0 3.0590 48.3
E5-2 3012 41.0
E6-1 3011 57.0 3.0598 48.5
E6-2 2961 44.0
E7-1 2938.5 84.0 2.9992 47.9
E7-2 3012 40.0
E8-1 2992 36.0 3.0142 49.0
E8-2 2968 21.0
E9 2977 33.0 0.1334 48.4
Stack C
E1 2996 51.0 1.9834 48.2
E2 3025 43.0 1.9534 48.3
E3-1 3018 54.0 3.0093 47.3
E3-2 2980 55.0
E4-1 2996 39.0 2.9805 48.3
E4-2 2996 56.0
E5-1 2965 60.0 3.0231 47.9
E5-2 2999 72.0
E6-1 2967 64.0 2.9761 48.7
E6-2 3022.5 56.5
E7-1 3006 58.0 3.0813 47.8
E7-2 2963 0.0
E8-1 2938 22.0 2.9647 48.2
E8-2 3006 37.0
E9 2980 45.0 0.1355 46.1
Stack D
E1 3011 33.0 1.9542 48.4
E2 2963 66.0 1.9534 48.3
E3-1 2966 63.0 3.0093 47.3
E3-2 3007 48.0
E4-1 3011 34.0 2.9805 48.3
E4-2 3038 69.0
E5-1 2969 48.0 3.0231 47.9
E5-2 2978 65.0
E6-1 3022 59.0 2.9761 48.7
E6-2 2987 60.0
E7-1 3022 41.0 3.0813 47.8
E7-2 2918 0.0
E8-1 3003 61.0 2.9647 48.2
E8-2 3020 54.0
E9 2939 33.0 0.1355 46.1

Guard Electronics Parameters

Gain (MeV/ch) Offset (ch)
G2AB 0.1340 47.6
G3AB 0.1308 45.7
G4AB 0.1321 46.3
G5AB 0.1340 45.9
G6AB 0.1306 44.4
G7AB 0.1300 44.1
G2CD 0.1313 46.9
G3CD 0.1305 45.4
G4CD 0.1357 46.2
G5CD 0.1337 46.6
G6CD 0.1394 46.4
G7CD 0.1366 45.3


Calibration Data (sample)

The final response of each telescope was tested at the GSI accelerator facility in Darmstadt, Germany. The figure below illustrates masses calculated based on one particular beam run. [CRIS Mass Histogram]


Resource Allocation and Nominal Detector Specifications


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Last modified 5 September 1997, mrt
URL: http://www.srl.caltech.edu/ACE/CRIS_SIS/crishw.html