語系:
繁體中文
English
說明(常見問題)
圖資館首頁
登入
回首頁
到查詢結果
[ subject:"Physics, Atomic." ]
切換:
標籤
|
MARC模式
|
ISBD
Buffer gas loading and evaporative c...
~
Harvard University.
Buffer gas loading and evaporative cooling in the multi-partial-wave regime.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Buffer gas loading and evaporative cooling in the multi-partial-wave regime.
作者:
Nguyen, Scott Vinh.
面頁冊數:
153 p.
附註:
Adviser: John Morrissey Doyle.
附註:
Source: Dissertation Abstracts International, Volume: 67-05, Section: B, page: 2611.
Contained By:
Dissertation Abstracts International67-05B.
標題:
Physics, Atomic.
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3217838
ISBN:
9780542693557
Buffer gas loading and evaporative cooling in the multi-partial-wave regime.
Nguyen, Scott Vinh.
Buffer gas loading and evaporative cooling in the multi-partial-wave regime.
- 153 p.
Adviser: John Morrissey Doyle.
Thesis (Ph.D.)--Harvard University, 2006.
This thesis describes the study of collisions in the multi-partial-wave regime relevant to the buffer gas cooling and trapping of atoms. A quantitative model is formulated to describe the dynamics of evaporative cooling and is used to infer elastic and inelastic collision rate constants of g el = 2.15(+2.5, -1.2) x 10-10 cm 3/s and gin = 1.36(+1.2, -0.7) x 10-12 cm3/s between two chromium atoms in the temperature range of 0.02-1 K and explains a long standing discrepancy between theory and experiment. Magnetic trapping is then extended to atomic manganese where up to 2 x 1012 Mn atoms are trapped in all six hyperfine states, allowing for the exploration of the role of the hyperfine interaction in spin-exchange collisions. In addition, we simultaneously trap a 55Mn-52Cr mixture and measure an inter-species inelastic rate constant of gMn,cr = 1.5 (+/-0.2) +/- 10-13 cm3/s. Demonstrating that buffer gas loading is a viable alternative to laser cooling, we have magnetically trapped and evaporatively cooled metastable helium in large numbers. 10 11 4He* atoms are trapped at an initial temperature of 400 mK and evaporatively cooled into the ultracold regime, resulting in a cloud of 2 +/- 0.5 x 109 atoms at 1.4 +/- 0.2 mK and an increase in phase space density of 5 orders of magnitude. Efficient evaporation indicates low collisional loss for 4He* in both the ultracold and multi-partial-wave regime, in agreement with theory.
ISBN: 9780542693557Subjects--Topical Terms:
227348
Physics, Atomic.
Buffer gas loading and evaporative cooling in the multi-partial-wave regime.
LDR
:02382nmm _2200253 _450
001
180547
005
20080111103734.5
008
090528s2006 eng d
020
$a
9780542693557
035
$a
00311571
040
$a
UMI
$c
UMI
100
0
$a
Nguyen, Scott Vinh.
$3
264121
245
1 0
$a
Buffer gas loading and evaporative cooling in the multi-partial-wave regime.
300
$a
153 p.
500
$a
Adviser: John Morrissey Doyle.
500
$a
Source: Dissertation Abstracts International, Volume: 67-05, Section: B, page: 2611.
502
$a
Thesis (Ph.D.)--Harvard University, 2006.
520
#
$a
This thesis describes the study of collisions in the multi-partial-wave regime relevant to the buffer gas cooling and trapping of atoms. A quantitative model is formulated to describe the dynamics of evaporative cooling and is used to infer elastic and inelastic collision rate constants of g el = 2.15(+2.5, -1.2) x 10-10 cm 3/s and gin = 1.36(+1.2, -0.7) x 10-12 cm3/s between two chromium atoms in the temperature range of 0.02-1 K and explains a long standing discrepancy between theory and experiment. Magnetic trapping is then extended to atomic manganese where up to 2 x 1012 Mn atoms are trapped in all six hyperfine states, allowing for the exploration of the role of the hyperfine interaction in spin-exchange collisions. In addition, we simultaneously trap a 55Mn-52Cr mixture and measure an inter-species inelastic rate constant of gMn,cr = 1.5 (+/-0.2) +/- 10-13 cm3/s. Demonstrating that buffer gas loading is a viable alternative to laser cooling, we have magnetically trapped and evaporatively cooled metastable helium in large numbers. 10 11 4He* atoms are trapped at an initial temperature of 400 mK and evaporatively cooled into the ultracold regime, resulting in a cloud of 2 +/- 0.5 x 109 atoms at 1.4 +/- 0.2 mK and an increase in phase space density of 5 orders of magnitude. Efficient evaporation indicates low collisional loss for 4He* in both the ultracold and multi-partial-wave regime, in agreement with theory.
590
$a
School code: 0084.
650
# 0
$a
Physics, Atomic.
$3
227348
690
$a
0748
710
0 #
$a
Harvard University.
$3
212445
773
0 #
$g
67-05B.
$t
Dissertation Abstracts International
790
$a
0084
790
1 0
$a
Doyle, John Morrissey,
$e
advisor
791
$a
Ph.D.
792
$a
2006
856
4 0
$u
http://libsw.nuk.edu.tw:81/login?url=http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3217838
$z
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3217838
筆 0 讀者評論
全部
電子館藏
館藏
1 筆 • 頁數 1 •
1
條碼號
館藏地
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
000000007412
電子館藏
1圖書
學位論文
TH
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
多媒體檔案
http://libsw.nuk.edu.tw:81/login?url=http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3217838
評論
新增評論
分享你的心得
Export
取書館別
處理中
...
變更密碼
登入