Research and Development of a liquid argon calorimeter with a fast readout technique

1)液氩量热计的机械设计我们设计了一台用于SSC等强子对撞机上的液氩强子量热计，在保证密封性的同时，又满足安全性要求，对如何支撑、如何装配、如何安装、如何安装等都进行了优化设计。如何冷却以及需要多长时间才能完成量热计。关于放置在液体中的液体的冷却，我们进行了实际测试，以证明它们可以安全冷却。2)具有快速成形时间的量热器的束流测试。我们已经建立了一个铅-液氩量能器，尺寸为1米× 1米，深度为1.7米（7.5个相互作用长度），并在布鲁克海文国家实验室用能量为0.5 - 20 GeV/cat的电子束和π介子束进行了测试，测试的整形时间为50、100和200 ns。我们研究了能量和时间分辨率，对电子和π介子的响应差异（e/h比），堆积效应。通过这些研究，我们可以得出结论，液氩快速读出技术是一个可行的强子对撞机，如SSC或LHC的使用。

1)Mechanical design of the liquid argon calorimeter We have designed a liquid argon hadronic calorimeter to be used at a hadron collider such as the SSC.The design has been optimized to maximize the hermeticity and at the same time to satisfy the safety requirement.We have also considered how to support,how to assemble,how to cool and how long it takes to complete the calorimeter.On the cooling of the preamps to be placed within the liquid,we made an actual test to prove that they can be safely cooled. 2)Beam test of a calorimeter with fast shaping times. We have built a lead-liquid argon calorimeter of the size 1 m by 1m with 1.7 m depth(7.5 interaction lengths),and tested it with beams of electrons and pions of energies between 0.5 and 20 GeV/cat the Brookhaven National Laboratory.The shaping times tested were 50,100 and 200 ns. We investigated the energy and timing resolutions,difference of responses on electrons and pions(e/h ratio),and pile up effect. With hese studies,we could conclude that the technique of liquid argon with fast read out is a viable one for a use at a hadron collider such as the SSC or LHC.