Search for Exotic Mesons-GAMS Collaboration

NA12/2实验数据采集结束后，GAMS4000光谱仪于1994年3 - 4月从北馆移至西馆，与WA91 OMEGA光谱仪合并使用。新的光谱仪系统在4月份进行了检查，并于5月份开始数据采集，并成功持续到8月份。数据分析表明，该光谱仪工作良好，在整个数据运行过程中积累了较高的统计数据。1994年9月，欧洲核子研究中心SPSLC批准了我们的新提议，作为WA102实验，并在1995年进行100天的实验。1996年预计再运行100天。KEK集团为目标周围TOF探测器的数据采集系统和升级做出了贡献。1991年和1993年NA12/2的DST由Dr.T.Kinashi等人完成。分析给出了^0和^0 ^0系统的新信息。对^0 ^0系统的分析也在进行中。另外，GAMS-4pi光谱仪于1994年11 - 12月在俄罗斯普罗维诺（Protovino）进行了校核，现已准备好进行数据采集。预计这一数据运行将提供高自旋态的新信息。1994年2月至10月，应Monbusho的邀请，俄罗斯IHEP的a.a.l ednev教授对IHEP 1991年和1992年的运行数据进行了数据分析。他完成了DST的生产。并分析了^0系统。结果将在未来的会议上公布。另一方面，探测器的研发也取得了成功。为CERN WA102实验的TOF系统研制了高性能的TDC和ADC。一个高增益和低噪声的前置放大器是由a.k.k konoplyannikov和s.e inaba等人开发的ppo和/或微带气体室。在IHEP、LAPP和KEK上研究了一种新型的以ppo重晶为原料的量热计。这被期望作为下一代高能物理实验的材料。一个原型ppo hodoscope的测试结果已提交并将发表。在GAMS合作框架下，J.P.Stroot和Yu.D.Prokoshkin访问KEK，讨论数据分析和合作。IHEP主任A.A.Logunov院士访问KEK，将IHEP与KEK的GAMS合作再延长5年。少

After the end of data taking of NA12/2 experiment, the GAMS4000 spectrometr was moved in March-April, 1994 from the North Hall to the West Hall and was combined with the WA91 OMEGA spectrometer. The new spectrom eter system, Which appeared as a good charged and gamma spectrometer, was checked in April and the data taking was started in May and continued successfully till August. The data analysis shows the spectrometer worked quite well and high statistics data were accumulated through the whole data run. In September, 1994, the CERN SPSLC approved our new proposal as an experiment WA102 and the 100 days run in next year 1995. In 1996 another 100 days run is expected. KEK group contributes to the data acquisition system and the upgrade of the TOF detector around the target.The DST's of 1991 and 1993 of NA12/2 were completed by Dr.T.Kinashi et al.. and the analysis gives new information of eta pi^0 and pi^0pi^0 system. The analysis of eta pi^0pi^0 system is also progressing.On the other … More hand, the check of the GAMS-4pi spectrometer was done in November-December, 1994 at Protovino, Russia and now the spectrotometer is ready for the data taking. It is expected this data run will give new information of high spin states. The test of a PWO heavy crystal was also done in December.Prof.A.A.Lednev of IHEP,Russia, who was invited by Monbusho during February-October, 1994, worked for the data analysys of the 1991 and 1992 run data obtained at IHEP.He finished production of the DST's.and did the analysis of eta pi^0 system. The result will appear in coming conferences.On the other hand, the detector R&Ds are also done successfully. High performance TDC and ADC were developed for the TOF system of the WA102 experiment at CERN.A high gain and low noise preamplifier is developed for the PWO and/or MicroStrip Gas Chambers by A.K.Konoplyannikov and S.Inaba et al.. A new calorimeter using heavy crystal of PWO was studied at IHEP,LAPP and KEK.This has been expected as a material of the high energy physics experiment of next generation. The result of test of a prototype PWO hodoscope was submitted and will be published.In the frame of GAMS colllabration, J.P.Stroot and Yu.D.Prokoshkin visited KEK to discuss about the data analysis and also about the collaboration. Academician A.A.Logunov, director of IHEP visted KEK to prolong the GAMS collaboration between IHEP and KEK for another 5 years. Less