25 EFFECTS OF TRANSMISSION LINE READOUT ELECTRONICS ON THE TIMING AND SPATIAL RESOLUTION PROPERTIES OF CHEVRON TYPE MICRO-CHANNEL PLATE PHOTOMULTIPLIER TUBES
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Description: June 1, 2009: Prepared in partial fulfillment of the requirements of the Office of Science, Department of Energy's Science Undergraduate Laboratory Internship under the direction of Edward May and Karen Byrum at the High Energy Physics Division, Argonne National Laboratory. From Abstract: Transmission Line (TL) readout electronics are a natural candidate for the basis of a readout scheme for large area fast photo-detectors built on Micro-Channel Plate (MCP) technology. This paper presents a study of the timing and spatial resolution properties of a 10 micron and a 25 micron Chevron type MCP-PhotoMultiplier Tubes (MCP-PMT) with TL readout. The MCPs were characterized at the Argonne National Laboratory laser test stand facility using a Hamamatsu picosecond laser and a commercial CAMAC system. For each MCP-PMT a timing resolution versus light level scan conducted at two gains near 105 in the 15 to 160 photoelectrons range is presented. Both MCPs yielded time resolutions of 10 ps at the 50 photoelectrons level, and demonstrated spatial resolutions 200 m along the TL at the higher gain and 158 photoelectrons level. These results indicate that the TL readout preserves the intrinsic time characteristics of the MCP-PMT and also provides sub- millimeter spatial resolution along the TL, and thus can serve as the basis for the readout of large area fast photo-detectors. Further studies of TLs implemented on MCP-PMTs of gradually increasing sizes are needed to better understand the issues that may arise while implementing TL readout on large area detectors.
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