کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8172918 1526337 2015 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Absolute position measurement in a gas time projection chamber via transverse diffusion of drift charge
ترجمه فارسی عنوان
اندازه گیری موقعیت مطلق در یک محفظه پروجکشن زمان گاز از طریق انتشار عرضی بار شارژ
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
چکیده انگلیسی
Time Projection Chambers (TPCs) with charge readout via micro pattern gaseous detectors can provide detailed measurements of charge density distributions. We here report on measurements of alpha particle tracks, using a TPC where the drift charge is amplified with Gas Electron Multipliers and detected with a pixel ASIC. We find that by measuring the 3-D topology of drift charge and fitting for its transverse diffusion, we obtain the absolute position of tracks in the drift direction. For example, we obtain a precision of ~1 cm for 0.8 cm-long alpha track segments. To our knowledge this is the first demonstration of such a measurement in a gas TPC. This technique has several attractive features: it does not require knowledge of the initial specific ionization, is robust against bias from diffuse charge below detection threshold, and is also robust against high charge densities that saturate the detector response.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 789, 21 July 2015, Pages 81-85
نویسندگان
, , , , , ,