skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The Cryogenic Dark Matter Search (CDMS-II) Experiment: First Results from the Soudan Mine

Abstract

There is an abundance of evidence that the majority of the mass of the universe is in the form of non-baryonic non-luminous matter that was non-relativistic at the time when matter began to dominate the energy density. Weakly Interacting Massive Particles, or WIMPs, are attractive cold dark matter candidates because they would have a relic abundance today of ~0.1 which is consistent with precision cosmological measurements. WIMPs are also well motivated theoretically. Many minimal supersymmetric extensions of the Standard Model have WIMPs in the form of the lightest supersymmetric partner, typically taken to be the neutralino. The CDMS II experiment searches for WIMPs via their elastic scattering off of nuclei. The experiment uses Ge and Si ZIP detectors, operated at <50 mK, which simultaneously measure the ionization and athermal phonons produced by the scattering of an external particle. The dominant background for the experiment comes from electromagnetic interactions taking place very close to the detector surface. Analysis of the phonon signal from these interactions makes it possible to discriminate them from interactions caused by WIMPs. This thesis presents the details of an important aspect of the phonon pulse shape analysis known as the ''Lookup Table Correction''. The Lookup Table Correctionmore » is a position dependent calibration of the ZIP phonon response which improves the rejection of events scattering near the detector surface. The CDMS collaboration has recently commissioned its experimental installation at the Soudan Mine. This thesis presents an analysis of the data from the first WIMP search at the Soudan Mine. The results of this analysis set the world's lowest exclusion limit making the CDMS II experiment at Soudan the most sensitive WIMP search to this date.« less

Authors:
 [1]
  1. Stanford Univ., CA (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15020277
Report Number(s):
FERMILAB-THESIS-2004-54
TRN: US0605139
DOE Contract Number:  
AC02-76CH03000
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABUNDANCE; ACCURACY; CALIBRATION; CRYOGENICS; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; ENERGY DENSITY; IONIZATION; NONLUMINOUS MATTER; NUCLEI; PHONONS; SCATTERING; SHAPE; STANDARD MODEL; UNIVERSE; ASTROPHYSICS; Astrophysics, Experiment-HEP

Citation Formats

Chang, Clarence Leeder. The Cryogenic Dark Matter Search (CDMS-II) Experiment: First Results from the Soudan Mine. United States: N. p., 2004. Web. doi:10.2172/15020277.
Chang, Clarence Leeder. The Cryogenic Dark Matter Search (CDMS-II) Experiment: First Results from the Soudan Mine. United States. doi:10.2172/15020277.
Chang, Clarence Leeder. Wed . "The Cryogenic Dark Matter Search (CDMS-II) Experiment: First Results from the Soudan Mine". United States. doi:10.2172/15020277. https://www.osti.gov/servlets/purl/15020277.
@article{osti_15020277,
title = {The Cryogenic Dark Matter Search (CDMS-II) Experiment: First Results from the Soudan Mine},
author = {Chang, Clarence Leeder},
abstractNote = {There is an abundance of evidence that the majority of the mass of the universe is in the form of non-baryonic non-luminous matter that was non-relativistic at the time when matter began to dominate the energy density. Weakly Interacting Massive Particles, or WIMPs, are attractive cold dark matter candidates because they would have a relic abundance today of ~0.1 which is consistent with precision cosmological measurements. WIMPs are also well motivated theoretically. Many minimal supersymmetric extensions of the Standard Model have WIMPs in the form of the lightest supersymmetric partner, typically taken to be the neutralino. The CDMS II experiment searches for WIMPs via their elastic scattering off of nuclei. The experiment uses Ge and Si ZIP detectors, operated at <50 mK, which simultaneously measure the ionization and athermal phonons produced by the scattering of an external particle. The dominant background for the experiment comes from electromagnetic interactions taking place very close to the detector surface. Analysis of the phonon signal from these interactions makes it possible to discriminate them from interactions caused by WIMPs. This thesis presents the details of an important aspect of the phonon pulse shape analysis known as the ''Lookup Table Correction''. The Lookup Table Correction is a position dependent calibration of the ZIP phonon response which improves the rejection of events scattering near the detector surface. The CDMS collaboration has recently commissioned its experimental installation at the Soudan Mine. This thesis presents an analysis of the data from the first WIMP search at the Soudan Mine. The results of this analysis set the world's lowest exclusion limit making the CDMS II experiment at Soudan the most sensitive WIMP search to this date.},
doi = {10.2172/15020277},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {9}
}

Thesis/Dissertation:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this thesis or dissertation.

Save / Share: