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MIP Reconstruction Techniques and Minimum Spanning Tree Clustering

Description: The development of a tracking algorithm for minimum ionizing particles in the calorimeter and of a clustering algorithm based on the Minimum Spanning Tree approach are described. They do not depend on information from the central tracking system. Both are important components of a particle flow algorithm currently under development.
Date: September 12, 2005
Creator: Mader, Wolfgang F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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WEATHER RELATED VARIABILITY OF CALORIMETERY PERFORMANCE IN A POORLY CONTROLLED ENVIRONMENT

Description: Four Antech airbath calorimeters at the Hanford site were studied for three summers and two winters in a location not well-shielded from outside temperature changes. Calorimeters showed significant increases in variability of standard measurements during hot weather. The increased variability is postulated to be due to a low setting of the Peltier cold face temperature, which doesn't allow the instrument to drain heat fast enough in a hot environment. A higher setting of the Peltier cold face m… more
Date: April 16, 2007
Creator: Cameron, M. A. & Spellman, J. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cell asymmetry correction for temperature modulated differential scanning calorimetry

Description: The quality of measurement of heat capacity by differential scanning calorimetry (DSC) is based on strict symmetry of the twin calorimeter, which is important for temperature-modulated DSC. Heat capacities for sapphire-filled and empty aluminium calorimeters (pans) under designed cell imbalance caused by different pan-masses were measured. In addition, positive and negative signs of asymmetry were explored by analyzing the phase-shift between temperature and heat flow for sapphire and empty run… more
Date: December 31, 1996
Creator: Ishikiriyama, K. & Wunderlich, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Characterization of the Coherent Noise, Electromagnetic Compatibility and Electromagnetic Interference of the Atlas Em Calorimeter Front End Board

Description: The ATLAS Electromagnetic (EM) calorimeter (EMCAL) Front End Board (FEB) will be located in custom-designed enclosures solidly connected to the feedtroughs. It is a complex mixed signal board which includes the preamplifier, shaper, switched capacitor array analog memory unit (SCA), analog to digital conversion, serialization of the data and related control logic. It will be described in detail elsewhere in these proceedings. The electromagnetic interference (either pick-up from the on board di… more
Date: September 20, 2000
Creator: Chase, R. L.; Citterio, M.; Lanni, F.; Makowiecki, D.; Radeka, V.; Rescia, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Calorimeter Simulation with Hadrons in CMS

Description: CMS is using Geant4 to simulate the detector setup for the forthcoming data from the LHC. Validation of physics processes inside Geant4 is a major concern in view of getting a proper description of jets and missing energy for signal and background events. This is done by carrying out an extensive studies with test beam using the prototypes or real detector modules of the CMS calorimeter. These data are matched with Geant4 predictions using the same framework that is used for the entire CMS dete… more
Date: November 1, 2008
Creator: Piperov, Stefan & /Sofiya, Inst. Nucl. Res. /Fermilab
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Flexible Support Test Procedure and Results

Description: Upon completion of the fabrication process, the four central calorimeter cryostat flexible support assemblies were sent to Construction Technology Laboratories (CTL) in Skokie, IL, where the required tests were performed for Richmond Lox prior to the installation of the stanchions in the cryostat. These tests were to simulate the simultaneous axial and transverse loading experienced by the stanchions when the cryostat undergoes the cool down process.
Date: December 4, 1987
Creator: Kurita, C. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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End Cap Calorimeter Inner Hadronic Module Installation

Description: The fixture used to hold the IH module while the EC Calorimeter is pul led over it consists of two tripod frames with a double wide flange between them. The two tripods have legs made of 6-inch Schedule 40 pipe, these legs are tied together with 2-inch Schedule 40 pipe. One of the legs sits on and is attached to a box made of 3/4-inch plates. The fixture was analyzed using ANSYS. The element used was a 3-D beam (STIF4). Equivalent properties were figured for the double wide flange. The legs of … more
Date: October 11, 1990
Creator: Stredde, H. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MH Test Filler Force Limitations

Description: The OH modules for the DO end calorimeter are being tested by supporting a load to simulate the MH, IH, and EM modules. This test structure, the MH filler, is inserted into the previously assembled OH modules, and then loaded with hydraulic jacks. The maximum test load applied by the jacks is 78,600 lb, which is via the two downstream jacks at 130% of the nominal load. Bill Cooper's memo of 9/10/90 is include as appendix C. This note presents calculations for the AISC maximum allowable stresses… more
Date: October 2, 1990
Creator: Primdahl, K. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Energy Calibration of the BaBar EMC Using the Pi0 Invariant Mass Method

Description: The BaBar electromagnetic calorimeter energy calibration method was compared with the local and global peak iteration procedures, of Crystal Barrel and CLEO-II. An investigation was made of the possibility of {Upsilon}(4S) background reduction which could lead to increased statistics over a shorter time interval, for efficient calibration runs. The BaBar software package was used with unreconstructed data to study the energy response of the calorimeter, by utilizing the {pi}{sup 0} mass constra… more
Date: April 6, 2007
Creator: Tanner, David J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiation Studies in the Antiproton Source

Description: Experiment E760 has a lead glass (Pb-G) calorimeter situated in the antiproton source tunnel in the accumulator ring at location A50. This location is exposed to radiation from several sources during antiproton stacking operations. A series of radiation studies has been performed over the last two years to determine the sources of this radiation and as a result, some shielding has been installed in the antiproton source in order to protect the lead glass from radiation damage.
Date: June 10, 1991
Creator: Church, Mike
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hadron calorimeters for future hadron colliders

Description: Hadron calorimeters are essential for jet and neutrino physics at collider experiments. Current hadron calorimeters for the ATLAS and CMS detectors are described. Increased energy and luminosity of future hadron colliders place constraints on detector technology. Difficulties for operation of the current detectors in future hadron collider environments are discussed. New experiments for future colliders should take notice of physics processes during jet evolution that place fundamental limits o… more
Date: January 27, 2004
Creator: Freeman, Jim
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Detector limitations, STAR

Description: Every detector has limitations in terms of solid angle, particular technologies chosen, cracks due to mechanical structure, etc. If all of the presently planned parts of STAR [Solenoidal Tracker At RHIC] were in place, these factors would not seriously limit our ability to exploit the spin physics possible in RHIC. What is of greater concern at the moment is the construction schedule for components such as the Electromagnetic Calorimeters, and the limited funding for various levels of triggers.
Date: July 13, 1998
Creator: Underwood, D. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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CC-EC Transporter Analysis

Description: The following calculations were used to develop a structure required to transport completed calorimeters (CC-EC) from the assembly area to a staging point for installation onto center beam. The transporter is equipped with four (4) 200 ton hydraulic cylinders and four (4) 200 ton capacity Hillman Rollers. The components are used for the lifting and moving of calorimeters. R. Wands is doing the Ansys analysis based on 2 conditions: (1) Statically loaded on the transporter support corner; and (2)… more
Date: December 7, 1987
Creator: Stredde, H.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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After-burning of nitropenta products in a calorimeter

Description: Explored here are the ''after-burning'' effects for explosions of Nitropenta (NP) charges in air. Detonation of the charge transforms the solid explosive ( C HNO 5 8412 , also known as PETN) into gaseous products that are rich in carbon and CO, which subsequently act as a fuel. When these hot ({approximately}3500 K) gases mix with air, rapid combustion (after-burning) takes place. The dynamics of this exothermic process was studied in ''pressure calorimeter'' experiments performed at EMI.
Date: June 18, 1999
Creator: Kuhl, A L; Neuwald, P & Reichenbach, H
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Master plate production for the tile calorimeter extended barrel modules.

Description: Approximately 41,000 master plates (Fig. 1) are required for the Extended Barrel Hadronic Calorimeter for the ATLAS experiment at the LHC. Early in the R&D program associated with the detector, it was recognized that the fabrication of these steel laminations was a significant issue, both in terms of the cost to produce these high precision formed plates, as well as the length of time required to produce all plates for the calorimeter. Two approaches were given serious consideration: laser … more
Date: March 10, 1999
Creator: Guarino, V.J.; Hill, N.; Petereit, E.; Price, L.E.; Proudfoot, J. & Wood, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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