D08-W0313 individual calibration
This page records the individual D08-W0313 calibration protocol dated 2025-02-11. Never reuse these factory calibration values for another detector. The listed PIXet version, 1.7.8.936, is the calibration-time version and may differ from the runtime SDK.
Item |
Certificate value |
|---|---|
Timepix clock |
10.0 MHz |
Ikrum |
1 |
FBK |
156 |
THL Coarse |
8 |
Preamp |
225 |
Equalization mean THL |
751.666 |
Equalization standard deviation |
2.250 |
Equalization masked pixels |
2 |
Final THL |
707 |
Threshold calibration A / B |
11.831 / 49.262 |
Minimum threshold |
3.697 keV |
THL at 5 keV |
691.585 (summary: THL=691) |
Bad pixels under X-ray test |
83 |
Largest bad-pixel cluster |
66 |
Ten-minute stability |
99.469% |
ToT energy resolution σ near 60 keV |
2.728 keV |
The digital/bias test found zero bad pixels, while the X-ray test found 83: these are different tests, not conflicting measurements of one metric. Bias leakage was tested from 15 to 150 V; the tabulated leakage current is 0.0000 µA at each point, which does not establish a universal zero-leakage guarantee.
The mean ToT energy calibration coefficients are A=1.642, B=22.945, C=19.630, and T=4.368. These are certificate calibration parameters, not values to pass directly to set_threshold(). The Python API’s set_threshold(threshold_kev) requests a threshold in keV through PIXet.
Both imaging (Counting) and tracking (Energy) are classified B / Usable for this unit; this does not guarantee performance under every experimental condition.
Source: D08-W0313 Calibration Protocol pp. 1–4.