東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Development of Metallic Magnetic Cal...

Bates, Cameron Russell.

Linked to FindBook

Google Book

Amazon

博客來

Development of Metallic Magnetic Calorimeters for Nuclear Safeguards Applications.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Development of Metallic Magnetic Calorimeters for Nuclear Safeguards Applications./
Author:	Bates, Cameron Russell.
Description:	182 p.
Notes:	Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.
Contained By:	Dissertation Abstracts International77-01B(E).
Subject:	Nuclear engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3720365
ISBN:	9781339013435

Development of Metallic Magnetic Calorimeters for Nuclear Safeguards Applications.
Bates, Cameron Russell.

Development of Metallic Magnetic Calorimeters for Nuclear Safeguards Applications. - 182 p.

Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.

Thesis (Ph.D.)--University of California, Berkeley, 2015.

Many nuclear safeguards applications could benefit from high-resolution gamma-ray spectroscopy achievable with metallic magnetic calorimeters. This dissertation covers the development of a system for these applications based on gamma-ray detectors developed at the University of Heidelberg. It demonstrates new calorimeters of this type, which achieved an energy resolution of 45.5 eV full-width at half-maximum at 59.54 keV, roughly ten times better than current state of the art high purity germanium detectors. This is the best energy resolution achieved with a gamma-ray metallic magnetic calorimeter at this energy to date. In addition to demonstrating a new benchmark in energy resolution, an experimental system for measuring samples with metallic magnetic calorimeters was constructed at Lawrence Livermore National Laboratory. This system achieved an energy resolution of 91.3 eV full-width at half-maximum at 59.54 keV under optimal conditions. Using this system it was possible to characterize the linearity of the response, the count-rate limitations, and the energy resolution as a function of temperature of the new calorimeter. With this characterization it was determined that it would be feasible to measure 242Pu in a mixed isotope plutonium sample. A measurement of a mixed isotope plutonium sample was performed over the course of 12 days with a single two-pixel metallic magnetic calorimeter. The relative concentration of 242Pu in comparison to other plutonium isotopes was determined by direct measurement to less than half a percent accuracy. This is comparable with the accuracy of the best-case scenario using traditional indirect methods. The ability to directly measure the relative concentration of 242Pu in a sample could enable more accurate accounting and detection of indications of undeclared activities in nuclear safeguards, a better constraint on source material in forensic samples containing plutonium, and improvements in verification in a future plutonium disposition treaty.

ISBN: 9781339013435Subjects--Topical Terms:

595435
Nuclear engineering.

Development of Metallic Magnetic Calorimeters for Nuclear Safeguards Applications.
LDR:02901nmm a2200277 4500 001 2075950
005 20161028152030.5
008 170521s2015 ||||||||||||||||| ||eng d
020 $a 9781339013435
035 $a (MiAaPQ)AAI3720365
035 $a AAI3720365
040 $a MiAaPQ $c MiAaPQ
100 1 $a Bates, Cameron Russell. $3 3191373
245 1 0 $a Development of Metallic Magnetic Calorimeters for Nuclear Safeguards Applications.
300 $a 182 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-01(E), Section: B.
500 $a Adviser: Kai Vetter.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2015.
520 $a Many nuclear safeguards applications could benefit from high-resolution gamma-ray spectroscopy achievable with metallic magnetic calorimeters. This dissertation covers the development of a system for these applications based on gamma-ray detectors developed at the University of Heidelberg. It demonstrates new calorimeters of this type, which achieved an energy resolution of 45.5 eV full-width at half-maximum at 59.54 keV, roughly ten times better than current state of the art high purity germanium detectors. This is the best energy resolution achieved with a gamma-ray metallic magnetic calorimeter at this energy to date. In addition to demonstrating a new benchmark in energy resolution, an experimental system for measuring samples with metallic magnetic calorimeters was constructed at Lawrence Livermore National Laboratory. This system achieved an energy resolution of 91.3 eV full-width at half-maximum at 59.54 keV under optimal conditions. Using this system it was possible to characterize the linearity of the response, the count-rate limitations, and the energy resolution as a function of temperature of the new calorimeter. With this characterization it was determined that it would be feasible to measure 242Pu in a mixed isotope plutonium sample. A measurement of a mixed isotope plutonium sample was performed over the course of 12 days with a single two-pixel metallic magnetic calorimeter. The relative concentration of 242Pu in comparison to other plutonium isotopes was determined by direct measurement to less than half a percent accuracy. This is comparable with the accuracy of the best-case scenario using traditional indirect methods. The ability to directly measure the relative concentration of 242Pu in a sample could enable more accurate accounting and detection of indications of undeclared activities in nuclear safeguards, a better constraint on source material in forensic samples containing plutonium, and improvements in verification in a future plutonium disposition treaty.
590 $a School code: 0028.
650 4 $a Nuclear engineering. $3 595435
650 4 $a Nuclear physics and radiation. $3 3173793
690 $a 0552
690 $a 0756
710 2 $a University of California, Berkeley. $b Nuclear Engineering. $3 1671064
773 0 $t Dissertation Abstracts International $g 77-01B(E).
790 $a 0028
791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3720365