S. W. Youn

Concept of multiple-cell cavity for axion dark matter search

Abstract In cavity-based axion dark matter search experiments exploring high mass regions, multiple-cavity design is under consideration as a method to increase the detection volume within a given magnet bore. We introduce a new idea, referred to as a multiple-cell cavity, which provides various benefits including a larger detection volume, simpler experimental setup, and easier phase-matching mechanism. We present the characteristics of this concept and demonstrate the experimental feasibility with an example of a double-cell cavity.

The Muon Certification Procedure of the D0 Experiment in Run II

This technical memo note describes the procedures used by the D0 experiment at the Fermilab Tevatron p¯ p Collider to determine the identification and reconstruction efficiencies for specific muon selection criteria for both data and Monte Carlo simulation. Dedicated corrections for the muons satisfying these criteria are derived, thus certifying them to be used in physics analyses at D0. The results of the efficiencies of certified muons are presented for a sub-sample of 4.2 fb 1 collected by the D0 experiment. The experimental techniques and procedures employed here are identical to those used for the full 9.7 fb 1 dataset.

Liquid scintillator tiles for calorimetry

Future experiments in high energy and nuclear physics may require large, inexpensive calorimeters that can continue to operate after receiving doses of 50 Mrad or more. The light output of liquid scintillators suffers little degradation under irradiation. However, many challenges exist before liquids can be used in sampling calorimetry, especially regarding developing a packaging that has sufficient efficiency and uniformity of light collection, as well as suitable mechanical properties. We present the results of a study of a scintillator tile based on the EJ-309 liquid scintillator using cosmic rays and test beam on the light collection efficiency and uniformity, and some preliminary results on radiation hardness.