X-ray analysis apparatus with pulse amplitude shift correction a

Details X-ray analysis apparatus with pulse amplitude shift correction a X-ray analysis apparatus with pulse amplitude shift correction a

1993-04-15

1994-10-18

Porta, David P.

X-ray or gamma ray systems or devices

Electronic circuit

With display or signaling

378 49, G01N 23223

Patent

active

053575512

ABSTRACT:
In a gas ionization x-ray detector pulse-amplitude shifts will adversely affect the accuracy of the analysis. At increasing count rates a space charge building up leads to a decrease of the impact ionization in the detector thereby causing the detected pulse amplitude to become lower. By means of addressing a pulse-shift correction random-access memory with digital signals representing detected pulse amplitudes count rates pertaining to high-energy parts and low-energy parts, respectively of a peak in a pulse-height distribution are generated. A difference of count rates for a high-energy part and for a low-energy part of the same peak in the pulse-height distribution indicates pulse-amplitude shift. On the basis of the differences of the high-energy count rate and the low-energy count rate a correction signal is produced for adjusting the amplification of the pulse-amplitudes. To obtain stable operation pulse-shift correction is activated only when the count rate exceeds a threshold value.

REFERENCES:
patent: 3790792 (1974-02-01), Ishijima
patent: 4121098 (1978-10-01), Jagoutz et al.
patent: 4546488 (1985-10-01), Kleefstra
"Principles and Practice of X-Ray Spectrometric Analysis", by E. P. Bertin, Plenum Press, New York, London, pp. 342-351.

Affiliated with

Also associated with

Rating

X-ray analysis apparatus with pulse amplitude shift correction a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with X-ray analysis apparatus with pulse amplitude shift correction a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray analysis apparatus with pulse amplitude shift correction a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2378462