3) Testbeam results for a Shashlik calorimeter with longitudinal segmentation 16 mn

Paolo Checchia (?)

In the frame of R&D for electromagnetic calorimetry at future e+ e- linear colliders different techniques have been studied to implement longitudinal segmentation in Shashlik calorimeters. Two prototypes with 5 X 5 cm2 lead/scintillator towers and WLS readout have been built. The longitudinal segmentation of the shower is achieved by modifying the front part of the detector. In one prototype vacuum photodiodes are inserted laterally for the first 8 radiation lengths, while in the second one fast scintillator is used in the first 5 radiation lengths. Both the prototypes have been exposed to beam at the CERN West Area, and the performance in term of energy resolution, uniformity, spatial resolution and electron/pion separation are described. The preliminary results of the exposure to the same beam of a third prototype, with a 3 X 3 cm2 lateral granularity are also presented.

4) A massive fine grain scintillating fiber calorimeter for the Cern to Gran Sasso LBL project (CNGS) 16 mn

Eugenio Scapparone (?)

An intense R&D program has been carried out by the NOE Collaboration during the last years, to develop a massive fine grain scintillating fiber calorimeter, to be used, in combination with an appropriate target, in a Long Base Line experiment at the CERN to Gran Sasso (CNGS) neutrino beam. The performance of a 4 tons NOE calorimeter prototype exposed to a test beam at CERN PS is shown. Results on the linearity and electromagnetic and hadronic energy resolution are reported.

5)CDF Endplug Shower Maximum Detector:Installed and working 16 mn

Benn Tannenbaum (?)

The Shower Maximum Detector of the CDF Endplug EM Calorimeter has been fully installed and instrumented. We present results of {\it in situ} cobalt-60 source testing and laser flasher calibration. We also examine the accuracy and efficiency of the entire electronic readout chain

6) Forward neutron calorimeter for H1 experiment at Desy 16 mn

Valentin Efremenko (?)

A new Forward Neutron Calorimeter (FNC) - a tile lead-scintillator sandwich read out by wavelength shifter fibers and photomultiplier tubes - is designed to measure the energy and scattering angle of high energy neutrons, which are produced in ep interactions at HERA collider at small angles. This calorimeter will replace in the period after HERA collider luminosity upgrade the old spaghetti type of calorimeter with already deteriorated energy response. The design, construction, tests and calibration at low and high energy proton beams are described

7) A New W/Scintillator Electromagnetic Calorimeter for ZEUS 16 mn

Ricardo Diaz (?)

A new electron detector, 5.3 m downstream from the ZEUS interaction point, is under construction. A calorimeter has been designed in the frame work of the upgrade of the ZEUS luminosity system, and complements the two detectors measuring the flux of bremsstrahlung photons. It will measure the corresponding bremsstrahlung electrons in the 4-9 GeV range. The combined information of these three detectors will provide handles to determine both the calibrations and acceptances of the system components. The solution adopted, a tungsten/scintillator spaghetti calorimeter, is driven by the fact that the available space for such detector, located inside one of the HERA quadrapole magnets of the electron ring, is just ~30x100 mm^2, in the transversal plane, and ~100 mm, in the longitudinal direction. Using scintillating fibers, 0.5 mm Dia., with ~1 mm spacing the Moliere radius can be kept close to the half-width of the detector avoiding significant energy leaks. Bench tests of different scintillating fibers concerning light yield, temperature stability (temperatures up to 80\060C are expected in the magnet), and radiation damage (also short-lived) have been performed. Results from test beam measurements at DESY, carried out with a prototype, are compared with Monte Carlo expectations.

8) HERA-B Electromagnetic Calorimeter16 mn

Sergey Shuvalov (?)

Current status of HERA-B ECAL is reported. Main results obtained during comissioning of the detector are presented. Performance studies and radiation damage issues are discussed.

9) Instrumentation and performance of the first TILECAL modules 16 mn

Mario David (?)

The status of the TILECAL module production is presented, with emphasis on the optical instrumentation steps and quality control of the scintillating tiles, WLS fibres and the final test and certification of the modules.

10) Hadron energy reconstruction for the ATLAS barrel combined calorimeter 16 mn

Yuri Kulchitsky (?)

Hadron energy reconstruction for the Atlas barrel prototype combined calorimeter, consisting of the lead-liquid argon electromagnetic part and the iron-scintillator hadronic part, in the framework of the non-parametrical method has been fulfilled. This method uses only the known e/h ratios and the electron calibration constants and does not require the determination of any parameters by a minimization technique and can be used for the fast energy reconstruction in the first level trigger. The obtained reconstruction of the mean values of energies is within $\pm 1\%$ and the fractional energy resolution is $[(58\pm3)\% \sqrt{GeV}/\sqrt{E}+(2.5\pm0.3)\%]\oplus (1.7\pm0.2)\ GeV/E$. The obtained value of the $e/h$ ratio for electromagnetic compartment of the combined calorimeter is $1.74\pm0.04$ and agrees with the prediction that e/h > 1.7 for this electromagnetic calorimeter. The results of the study of the longitudinal hadronic shower development are presented. The data have been taken in the H8 beam line of the CERN SPS using pions of 10 -- 300 GeV.

11) Title : studies of the response of the prototype cms hadron calorimeter, 16 mn

Pawel de Barbaro (?)

We report on the response of a prototype cms hadron calorimeter module to charged particle beams of pions, muons and electrons with momenta up to 375 gev/c. The data were taken at the h2 and h4 beamlines at cern in 1995 and 1996. The prototype sampling calorimeter used copper absorber plates and scintillator tiles with wavelength shifting fibers for readout. The effects of magnetic field of up to 3 tesla are presented, and the effects of an upstream lead tungstate crystal electromagnetic calorimeter on the linearity and energy resolution of the combined calorimetric system to hadrons are evaluated. The results are compared with MC simulations and are used to optimize the choice of total absorber depth, sampling frequency, and longitudinal readout segmentation.

12) Title : Calibration and and Reconstruction Performances of the KLOE Electromagnetic Calorimeter 16 mn

P. Gauzzi Rome University and INFN

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