SNOWMASS WHITE PAPER - SLHC Endcap 1.4<y<4 Hadron Optical Calorimetry Upgrades in CMS with Applications to NLC/T-LEP, Intensity Frontier, and Beyond

Radiation damage in the plastic scintillator and/or readout WLS fibers in the HE endcap calorimeter 1.4<y<4 in the CMS experiment at LHC and SLHC will require remediation after 2018. We describe one alternative using the existing brass absorber in the Endcap calorimeter, to replace the plastic scintillator tiles with BaF2 tiles, or quartz tiles coated with thin(1-5 micron) films of radiation-hard pTerphenyl(pTP) or the fast phosphor ZnO:Ga. These tiles would be read-out by easily replaceable arrays of straight, parallel WLS fibers coupled to clear plastic-cladded quartz fibers of proven radiation resistance. We describe a second alternative with a new absorber matrix extending to 1.4<y<4 in a novel Analog Particle Flow Cerenkov Compensated Calorimeter, using a dual readout of quartz tiles and scintillating (plastic, BaF2, or pTP/ ZnO:Ga thin film coated quartz, or liquid scintillator) tiles, also using easily replaceable arrays of parallel WLS fibers coupled to clear quartz transmitting fibers for readout. An Analog Particle Flow Scintillator-Cerenkov Compensated Calorimeter has application in NLC/T-LEP detectors and Intensity Frontier detectors

Monte Carlo Simulations of Heavy Particles for the Large Hadron Collider

As the Large Hadron Collider has switched on at CERN in Geneva, accurate predictions for complex hadronic processes are essential for the validation of theory and therefore the success of the machine. After motivating the requirement for a Monte Carlo event generator, the principles and Physics behind such a generator are laid out. Following this, the Monte Carlo tuning system Professor is used to give an assessment of the uncertainty from tuning Herwig++ and the results from this analysis used, along with a more accurate implementation of Higgs boson decays using the POWHEG method, to determine the error associated with searching for the Higgs boson with a jet substructure technique. Then, modifications to the shower to take into account the top quark width are presented along with radiation patterns from top quark production processes for up to two external gluons. A general algorithm is outlined for systematically including these corrections. Finally, as the LHC is ultimately a discovery machine, it is pertinent to provide Monte Carlo studies of new Physics. The colour sextet diquark model is looked at in the final chapter of this thesis, and the associated phenomenology studied

Using grounded theory to inform the design of energy interventions for the workplace

Much work has been published on using technological interventions to motivate reductions in home energy consumption. These interventions have produced promising results, but typically focus on emphasising the financial benefits of reductions in consumption to users. Motivating employees to reduce their consumption of energy in the workplace is more problematic, as they are typically not responsible for energy costs. There has been very little work to date addressing energy interventions in the workplace, and indeed, there are many challenges in doing so. This paper presents an overview of the initial user-centred design stage of a large energy research project called Electro-Magnates. Three day-long workshops were run with a total of 65 participants from 5 universities and a number of representatives from industry. The workshops’ main focus was understanding behaviour change in organisations in an energy resource and usage context, supported by designing a 12 month intervention. Audio and design task accounts were transcribed and analysed using the grounded theory approach with the developed theory forming the design requirements and implications for the Electro-Magnates intervention software. Our findings identified some of the key concepts for inclusion in a workplace energy intervention; incentivisation, openness and management buy-in

Snowmass White Paper CMS Upgrade: Forward Lepton-Photon System

This White Paper outlines a proposal for an upgraded forward region to extend CMS lepton (e, mu) and photon physics reach out to 2.2<eta<5 for LHC and SLHC, which also provides better performance for the existing or new forward hadron calorimetry for jet energy and (eta, phi) measurements, especially under pileup/overlaps at high lumi, as LHC luminosity, energy and radiation damage increases

Quartz Plate Calorimetry for CMS HE Upgrade

Analysis of the CMS data and the simulation prediction based on these results indicate that the performance of the current scintillators in the CMS Hadron Endcap Calorimeter (HE) tiles will degrade dramatically in the High Luminosity LHC (HL-LHC) era. In order to continue the physics program in this region, the HE tiles will need to be replaced. The new tiles should have comparable/improved performance, be radiation hard, reliable and robust.Comment: 4 pages, 4 figure