ONLINE ANALYSIS FOR THE OBELIX DRIFT CHAMBERS AT LEAR

被引：11

作者：

BALESTRA, F

BOSSOLASCO, S

BUSSA, MP

BUSSO, L

FAVA, L

FERRERO, L

GARFAGNINI, R

GRASSO, A

MAGGIORA, A

PANZIERI, D

PIRAGINO, G

TOSELLO, F

ZOSI, G

LANARO, A

SANTI, L

机构：

[1] UNIV TURIN,IST FIS GEN,I-10124 TURIN,ITALY

[2] INFN,LAB NAZL FRASCATI,FRASCATI,ITALY

[3] INFN,SEZ TRIESTE,UDINE,ITALY

[4] UNIV UDINE,DIPARTIMENTO FIS,I-33100 UDINE,ITALY

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1992年 / 323卷 / 1-2期

关键词：

D O I：

10.1016/0168-9002(92)90342-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report on the characteristics and performances of front-end electronics and a data acquisition system for the jet drift chambers of the OBELIX experiment (PS201), installed at the LEAR facility of CERN. The signals of the chambers are digitized by 100 MHz 8-bit nonlinear FADCs readout through a VME-based tree-like acquisition chain. Data reduction and saving of off-line reconstruction time is obtained through zero suppression and by means of 80 embedded digital signal processors, which provide the drift time, the z-coordinate and the dE/dx sample information. With minimum ionizing particles we achieve a resolution of 160 mum in the r-phi plane and of 0.8% in the z-coordinate, and a double hit separation of about 2 mm. Preliminary results on dE/dx resolution are: sigma/mean = 12% and pi/K separation up to 500 MeV/c.

引用

页码：523 / 527

页数：5

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