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arXiv 0811.4120physics.ins-det
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双层微图形电极GEM及其应用

GEMs with Double Layred Micropattern Electrodes and their Applications

A. Di Mauro, P. Martinengo, E. Nappi, R. Oliveira, V. Peskov, F. Pietropaolo, P. Picchi

摘要:

我们已经开发和测试了几种新的设计的GEM探测器与微电子技术制造的微图案电极。在一种设计中,检测器电极的内层由薄金属条组成,外层由通过丝网印刷技术制造的电阻网格制成。在其他设计中,电极由HV通过丝网印刷技术制造的微电阻器馈送的金属条制成。由于这些特点,新的探测器有几个重要的优势,传统的宝石或普通厚宝石。例如,电阻网格(在第一种设计中)和丝网印刷电阻器(在其他设计中)在放电的情况下限制电流,使这些检测器具有固有的火花保护。我们将在这里描述我们的测试与光敏版本的这些探测器(涂有碘化铯层)和努力实现它们在几个应用程序。特别是,我们将把重点放在我们的活动,对爱丽丝丰富的探测器升级和测试的简化原型的低温暗物质探测器。

英文摘要:

We have developed and tested several new designs of GEM detectors with micropattern electrodes manufactured by microelectronic technology. In one design, the inner layer of the detector electrode consists of thin metallic strips and the outer layer is made of a resistive grid manufactured by a screen printing technology. In other designs, the electrodes were made of metallic strips fed by HV via micro-resistors manufactured by a screen printing technology. Due to these features, the new detectors have several important advantages over conventional GEMs or ordinary thick GEMs. For example, the resistive grid (in the first design) and the screen printed resistors (in other designs) limited the current in case of discharges, making these detectors intrinsically spark-protected. We will here describe our tests with the photosensitive versions of these detectors (coated with CsI layers) and the efforts of implementing them in several applications. In particular, we will focus on our activity towards the ALICE RICH detector upgrade and on tests of simplified prototypes of cryogenic dark matter detectors.

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