Preliminary Beam Test Research Articles

The R&D program for silicon detectors in CMS

Abstract This paper describes the main achievements in the development of radiation resistant silicon detectors to be used in the CMS tracker. After a general description of the basic requirements for the operation of large semiconductor systems in the LHC environment, the issue of radiation resistance is discussed in detail. Advantages and disadvantages of the different technological options are presented for comparison. Laboratory measurements and test beam data are used to check the performance of several series of prototypes fabricated by different companies. The expected performance of the final detector modules are presented together with preliminary test beam results on system prototypes.

Test beam results of silicon drift detector prototypes for the ALICE experiment

We report preliminary beam test results of linear Silicon Draft Detector prototypes for the ALICE experiment. Linearity, resolution, charge transport and collection, and efficiency have been studied using a minimum ionizing particle beam for a very large area detector prototype read out with the OLA preamplifier/shaper and for another detector read out using a new transimpedance amplifier with a non linear response.

The silicon tracking system of CMS

The paper describes the large silicon tracking system of CMS, one of the two general purpose detectors planned at the Large Hadron Collider of CERN. The system consists of three layers of silicon microstrip detectors instrumenting the interaction region as part of the Inner Tracking Detector of CMS. The expected performance of the system is discussed together with preliminary test beam results on single and double-sided prototype detectors.

First beam tests of a Fast-RICH prototype with VLSI readout electronics

In this paper we briefly discuss the fast ring imaging Cherenkov detector technique that we have developed for application in proximity-focused geometry with solid crystal radiators (LiF, CaF2), and multiwire chamber photon detector using TEA in CH4 as a photosensor and cathode-pad readout. In particular, we describe the large-area full-scale Prototype of 12000 channels that we have constructed, along with associated technology such as the dedicated VLSI readout electronics that we have developed. We report the performance of the Prototype in a hadron test beam at the CERN PS. These tests give a Cherenkov angle resolution σθ = 13.8 mrad per photon, photoelectron yield Npecorr = 11.20 pe/image, and momentum separation limit pπK (3σ) = 2.86 GeV/c for LiF radiator; and σθ = 17.0 mrad, Npecorr = 9.88 pe/image, and pπK (3σ) = 2.39 GeV/c for CaF2 radiator. The system is well described by Monte Carlo simulations. Operation of the detector over several months has proven it to be reliable and robust. Preliminary test beam results taken with large-area CsI reflective photocathode detectors are also presented.

NBS-LANL RTM Injector Installation

The injector for the NBS-LANL CW racetrack microtron consists of a 100 KeV electron gun and beam transport line followed by a 5 MeV linac. The function of the gun and transport line, which have been installed at NBS, is to provide a chopped and bunched 100 KeV and up to 0.67 mA dc or pulsed beam of very low transverse emittance for matched insertion into the linac. In this paper the authors present both the design and construction details of the 100 KeV system and the results of preliminary beam tests. The tests conducted thus far show the gun and transport system to be performing well within design specifications.