[en] We report a series of measurements directed to assess the suitability of alanine as a mailable dosimeter for dosimetry quality assurance of proton radiation therapy beams. These measurements include dose-response of alanine at 140 MeV, and comparison of response vs energy with a parallel plate ionization chamber. All irradiations were made at the Harvard Cyclotron Laboratory, and the dosimeters were read at NIST. The results encourage us that alanine could be expected to serve as a mailable dosimeter with systematic error due to differential energy response no greater than 3% when doses of 25 Gy are used. (Author)

[en] This paper describes the manufacture and testing of multi-cell limited streamer chambers destined for use in the hadron calorimeter of the OPAL detector at LEP. All operations, from chamber cathode coating to the testing of completed sub-assemblies, have been performed under the same roof. The experience gained is useful in highlighting procedures crucial to the successful construction of this type of detector

[en] This paper describes the manufacture of multicell plastic limited streamer chambers for use in the hadron calorimeter of the OPAL detector at LEP. The chambers are of the PVC coverless type with highly resistive cathodes. We discuss the assembly procedure with particular emphasis on the crucial cathode preparation process. A summary of test results is also presented. (orig.)