A heterodyne dispersion interferometer for wide bandwidth density measurements on DIII-D

被引：14

作者：

Akiyama, T. ^{[1
]}

Van Zeeland, M. A. ^{[2
]}

Boivin, R. L. ^{[2
]}

Carlstrom, T. N. ^{[2
]}

Chavez, J. A. ^{[2
]}

Muscatello, C. M. ^{[2
]}

O'Neill, R. ^{[2
]}

Vasquez, J. ^{[2
]}

Watkins, M. ^{[2
]}

Martin, W. ^{[2
]}

Colio, A. ^{[3
]}

Finkenthal, D. K. ^{[3
]}

Brower, D. L. ^{[4
]}

Chen, J. ^{[4
]}

Ding, W. X. ^{[4
]}

Perry, M. ^{[5
]}

机构：

[1] Natl Inst Fus Sci, 322-6 Oroshi Cho, Toki, Gifu 5095292, Japan

[2] Gen Atom Co, POB 85608, San Diego, CA 92186 USA

[3] Palomar Coll, San Marcos, CA 92069 USA

[4] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[5] Calif State Univ San Marcos, San Marcos, CA 92096 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2018年 / 89卷 / 10期

关键词：

Interferometers - Heterodyning - Dispersions - Carbon dioxide lasers;

D O I：

10.1063/1.5037997

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In order to improve both the density and particularly the temporal resolution beyond previous dispersion interferometers (DIs), a heterodyne technique based on an acousto-optic (AO) cell has been added to the DI. A 40 MHz drive frequency for the AO cell allows density fluctuation measurements into the MHz range. A CO2 laser-based heterodyne DI (HDI) installed on DIII-D has demonstrated that the HDI is capable of tracking the density evolution throughout DIII-D discharges, including disruption events and other rapid transient phenomena. The data also show good agreement with independent density measurements obtained with the existing DIII-D two-color interferometer. The HDI line-integrated density resolution sampled over a 1 s interval is similar to 9 x 10(17) m(-2). Density fluctuations induced by MHD instabilities are also successfully measured by the HDI. Published by AIP Publishing.

引用

页数：5

共 11 条

[1] Bench testing of a heterodyne CO2 laser dispersion interferometer for high temporal resolution plasma density measurements [J].

Akiyama, T. ;

Van Zeeland, M. A. ;

Boivin, R. L. ;

Carlstrom, T. N. ;

Chavez, J. A. ;

Muscatello, C. M. ;

O'Neill, R. C. ;

Vasquez, J. ;

Watkins, M. ;

Martin, W. ;

Colio, A. ;

Finkenthal, D. K. ;

Brower, D. L. ;

Chen, J. ;

Ding, W. X. ;

Perry, M. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2016, 87 (12)

[2] Design of a dispersion interferometer combined with a polarimeter to increase the electron density measurement reliability on ITER [J].

Akiyama, T. ;

Sirinelli, A. ;

Watts, C. ;

Shigin, P. ;

Vayakis, G. ;

Walsh, M. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2016, 87 (11)

[3] Dispersion interferometer using modulation amplitudes on LHD [J].

Akiyama, T. ;

Yasuhara, R. ;

Kawahata, K. ;

Okajima, S. ;

Nakayama, K. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2014, 85 (11)

[4] Dispersion interferometer based on a CO2 laser for TEXTOR and burning plasma experiments [J].

Bagryansky, P. A. ;

Khilchenko, A. D. ;

Kvashnin, A. N. ;

Lizunov, A. A. ;

Voskoboynikov, R. V. ;

Solomakhin, A. L. ;

Koslowski, H. R. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2006, 77 (05)

[5]

Brower D. L., 2010, COMMUNICATION

[6]

Brunner K. J., JINST UNPUB

[7] DISPERSION INTERFEROMETER FOR CONTROLLED FUSION DEVICES [J].

DRACHEV, VP ;

KRASNIKOV, YI ;

BAGRYANSKY, PA .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1993, 64 (04) :1010-1013

[8]

Knauer J., WPS1PR16 EUR

[9] Tests of a full-scale ITER toroidal interferometer and polarimeter (TIP) prototype on the DIII-D tokamak (invited) [J].

Van Zeeland, M. A. ;

Carlstrom, T. N. ;

Finkenthal, D. K. ;

Akiyama, T. ;

Boivin, R. L. ;

Colio, A. ;

Du, D. ;

Gattuso, A. ;

Glass, F. ;

Muscatello, C. M. ;

O'Neill, R. ;

Smiley, M. ;

Vasquez, J. ;

Watkins, M. ;

Brower, D. L. ;

Chen, J. ;

Ding, W. X. ;

Johnson, D. ;

Mauzey, P. ;

Perry, M. ;

Watts, C. ;

Wood, R. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2018, 89 (10)

[10] Tests of a two-color interferometer and polarimeter for ITER density measurements [J].

Van Zeeland, M. A. ;

Carlstrom, T. N. ;

Finkenthal, D. K. ;

Boivin, R. L. ;

Colio, A. ;

Du, D. ;

Gattuso, A. ;

Glass, F. ;

Muscatello, C. M. ;

O'Neill, R. ;

Smiley, M. ;

Vasquez, J. ;

Watkins, M. ;

Brower, D. L. ;

Chen, J. ;

Ding, W. X. ;

Johnson, D. ;

Mauzey, P. ;

Perry, M. ;

Watts, C. ;

Wood, R. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2017, 59 (12)

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