Radiation tolerant D/A converters for the LHC cryogenic system

被引：16
作者：
Franco, FJ
Zong, Y
de Agapito, JA
Marques, JG
Fernandes, AC
Casas-Cubillos, J
Rodriguez-Ruiz, MA
机构：
[1] Univ Complutense Madrid, Fac Ciencias Fis, Dept Fis Aplicada 3, E-28040 Madrid, Spain
[2] Inst Tecnol & Nucl, Portuguese Res Reactor, P-2686953 Sacavem, Portugal
[3] CERN, AT Div, CH-1211 Geneva, Switzerland
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2005年 / 553卷 / 03期
关键词：
COTS; D/A converters; instrumentation; radiation damage;
D O I：
10.1016/j.nima.2005.07.031
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The electronic instrumentation of the Large Hadron Collider (LHC) cryogenic system is expected to receive a large radiation dose (> 10(13) n cm(-2) and 1-2 kGy (Si)) within 10 years of activity so all the electronic devices should tolerate this radiation level without a significant degradation. This paper focuses on the selection of a radiation tolerant 12-bit parallel input D/A converter suitable for the signal conditioners for cryogenic thermometry in the LHC. During an initial campaign, some candidate converters were irradiated to determine the most tolerant device. Once this was determined, a massive test was carried out. Some weak points of the selected device were addressed through the use of an external voltage source and a radiation tolerant operational amplifier. The tests show that a system consisting of an AD565 D/A converter, coupled to an external voltage reference and an OPA627 operational amplifier can tolerate a total radiation dose up to 5 x 10(13) n cm(-2) and 2100Gy (Si), thus satisfying the requirements set by CERN. (c) 2005 Elsevier B.V. All rights reserved.
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收藏
页码：604 / 612
页数：9
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