CMS hadronic forward calorimeter

Merlo, JP
Tests of quartz fiber prototypes, based on the detection of Cherenkov light from showering particles, demonstrate a detector possessing all of the desirable characteristics for a forward calorimeter. A prototype for the CMS experiment consists of 0.3 mm diameter fibers embedded in a copper matrix. The response to high energy (10-375 GeV) electrons, pions, protons and muons, the light yield, energy and position resolutions, and signal uniformity and Linearity, are discussed.


Squeeze-like language spoken by optical instruments
Baskal, S; Georgieva, E; Kim, YS (2003-06-13)
Ray optics is needed in all optical measurement processes. In ray optics, the basic scientific language consists of two-by-two matrices. The Jones matrix in polarization is two-by-two, the S-matrix for multilayer optics is two-by-two, the lens and translation matrices in lens optics are two-by-two, the laser cavity matrices are also two-by-two. There are many other two-by-two matrices in optics. These small matrices are mathematically simple enough, but also form a representation of the six-parameter Lorent...
High speed automatic scanning systems for emulsion analysis in the opera experiment
Altınok, Özgür; Güler, Ali Murat; Department of Physics (2011)
The aim of the OPERA experiment is to verify the neutrino oscillation, directly measuring the appearance of from an initially pure beam produced at CERN. For this purpose OPERA detector is located underground Gran Sasso Laboratory(LNGS) 730 km away from CERN. The detector structure designed to be a hybrid system consisting of emulsion targets and electronic detectors. Total area of the emulsion targets in the OPERA detector is around 110000 m2 which needs fast and reliable automatic scanning systems. For th...
An investigation of x-ray escape for an HPGe detector
Can, Cüneyt; Bilgici, SZ (Wiley, 2003-07-01)
X-ray escape peaks for a planar HPGe detector were investigated for a point source of photons with 59.5 keV energy. The effect of the solid angle for the incident photons on the escape probability of Ge K x-rays was studied using collimators with varying apertures. A Monte Carlo program was also developed to estimate the probability of escape for various mechanisms and routes. The experimental and simulation results showed that the escape probability is essentially constant for a wide range of collimator ra...
Optical characterization of silicon based hydrogenated amorphous thin films by un-visible and infrared measurements
Kılıç, İlker; Katırcıoğlu, Bayram; Department of Physics (2006)
Various carbon content hydrogenated amorphous silicon carbide (a-Si1ŁxCx:H) and hydrogenated amorphous silicon (a-Si:H) thin films have been deposited on various substrates by using plasma enhanced chemical vapour deposition (PECVD) technique. Transmission spectra of these films have been determined within UV-Visible region and the obtained data were analysed to find related physical constants such as; refractive indices, thicknesses, etc. Fourier transform infrared (FT-IR) spectrometry technique has been u...
Mems gyroscopes for tactical-grade inertial measurement applications
Alper, Said Emre; Akın, Tayfun; Department of Electrical and Electronics Engineering (2005)
This thesis reports the development of high-performance symmetric and decoupled micromachined gyroscopes for tactical-grade inertial measurement applications. The symmetric structure allows easy matching of the resonance frequencies of the drive and sense modes of the gyroscopes for achieving high angular rate sensitivity; while the decoupled drive and sense modes minimizes mechanical cross-coupling for low-noise and stable operation. Three different and new symmetric and decoupled gyroscope structures with...
Citation Formats
J. Merlo, “CMS hadronic forward calorimeter,” NUCLEAR PHYSICS B, pp. 41–46, 1998, Accessed: 00, 2020. [Online]. Available: