Time calibration is a crucial item for a shower array performance as it uses the time of flight method to reconstruct the arrival direction of the primary particle. This paper presents a software time calibration algorithm exploiting the continuous detector feature based on the assumption of locally flat shower front. On the small portions of the detector (tens of m2) a simple time-position fit of the arriving particles provides the time calibration constants of that part of detector. Then, a second step is needed to measure the time offset among the different portions obtaining the complete detector calibration. This algorithm is applied to ARGO-YBJ detector with a high trigger rate (several kHz) by means of an online processing and its performance is discussed.
Online software time calibration for a continuous air shower array / Mastroianni, S.; Iacovacci, M.. - In: PROCEEDINGS OF THE IEEE. - ISSN 1558-2256. - Published in: Real Time Conference (RT), 2012 18th IEEE-NPSS:(2012), pp. 1-5. [10.1109/RTC.2012.6418109]
Online software time calibration for a continuous air shower array
Mastroianni, S.;Iacovacci, M.
2012
Abstract
Time calibration is a crucial item for a shower array performance as it uses the time of flight method to reconstruct the arrival direction of the primary particle. This paper presents a software time calibration algorithm exploiting the continuous detector feature based on the assumption of locally flat shower front. On the small portions of the detector (tens of m2) a simple time-position fit of the arriving particles provides the time calibration constants of that part of detector. Then, a second step is needed to measure the time offset among the different portions obtaining the complete detector calibration. This algorithm is applied to ARGO-YBJ detector with a high trigger rate (several kHz) by means of an online processing and its performance is discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
