In order to reduce backgrounds from radon-daughter plate-out onto detector surfaces, an ultra-low-radon cleanroom is being commissioned at the South Dakota School of Mines and Technology. An improved vacuum-swing-adsorption radon mitigation system and cleanroom build upon a previous design implemented at Syracuse University that achieved radon levels of ∼0.2 Bq m−3. This improved system will employ a better pump and larger carbon beds feeding a redesigned cleanroom with an internal HVAC unit and aged water for humidification. With the rebuilt (original) radon mitigation system, the new low-radon cleanroom has already achieved a > 300× reduction from an input activity of 58.6 ± 0.7 Bq m−3 to a cleanroom activity of 0.13 ± 0.06 Bq m−3.
REFERENCES
1.
H.
Simgen
, “Radon assay and purification techniques
,” in Topical Workshop on Low Radioactivity Techniques: LRT 2013
, edited by L.
Miramonti
, and L.
Pandola
, 2013
, vol. 1549 of
American Institute of Physics Conference Series
, pp. 102
–107
.2.
K.
Kobayashi
, “Surface purity control during XMASS detector refurbishment
,” in Topical Workshop on Low Radioactivity Techniques: LRT 2015
, edited by J. L.
Orrell
, American Institute of Physics Conference Series
, 2015
, https://www.npl.washington.edu/indico/contributionDisplay.py?contribId=24&confId=5.3.
R.
Agnese
et al. (SuperCDMS Collaboration)
, Physical Review Letters
112
, 241302
(2014
), 1402.7137
.4.
X.-F.
Navick
, and EDELWEISS Collaboration
, “Background suppression in the Edelweiss-III experiment
,” in Topical Workshop on Low Radioactivity Techniques: LRT 2013
, edited by L.
Miramonti
, and L.
Pandola
, 2013
, vol. 1549
of American Institute of Physics Conference Series
, pp. 148
–151
.5.
R.
Bunker
, Z.
Ahmed
, M. A.
Bowles
, S. R.
Golwala
, D. R.
Grant
, M.
Kos
, R. H.
Nelson
, R. W.
Schnee
, A.
Rider
, B.
Wang
, and A.
Zahn
, “The BetaCage, an ultra-sensitive screener for surface contamination
,” in Topical Workshop on Low Radioactivity Techniques: LRT 2013
, edited by L.
Miramonti
, and L.
Pandola
, 2013
, vol. 1549
of American Institute of Physics Conference Series
, pp. 132
–135
.6.
R. W.
Schnee
, The BetaCage, an Ultra-sensitive Screener for Surface Contamination, Talk at the
Topical Workshop on Low Radioactivity Techniques: LRT 2015
(2015
), https://www.npl.washington.edu/indico/contributionDisplay.py?contribId=48&confId=5.7.
J.
Mott
, and SuperNEMO Collaboration
, “Low-background tracker development for SuperNEMO
,” in Topical Workshop on Low Radioactivity Techniques: LRT 2013
, edited by L.
Miramonti
, and L.
Pandola
, 2013
, vol. 1549
of American Institute of Physics Conference Series
, pp. 152
–155
.8.
B.
Wang
, “Background analysis techniques in the CUORE experiment
,” in Topical Workshop on Low Radioactivity Techniques: LRT 2015
, edited by J. L.
Orrell
, American Institute of Physics Conference Series
, 2015
, https://www.npl.washington.edu/indico/contributionDisplay.py?contribId=82&confId=5.9.
D. S.
Akerib
et al. (LUX Collaboration)
, Astroparticle Physics
62
, 33
–46
(2014
), 1403.1299
.10.
R. W.
Schnee
, M. A.
Bowles
, R.
Bunker
, K.
McCabe
, J.
White
, P.
Cushman
, M.
Pepin
, and V. E.
Guiseppe
, “Removal of long-lived 222Rn daughters by electropolishing thin layers of stainless steel
,” in Topical Workshop on Low Radioactivity Techniques: LRT 201
, edited by L.
Miramonti
, and L.
Pandola
, 2013
, vol. 1549
of American Institute of Physics Conference Series
, pp. 128
–131
.11.
A.
Nachab
, “Radon reduction and radon monitoring in the NEMO experiment,” in AIP Conf. Proc. 897: Topical Workshop on Low Radioactivity Techniques: LRT 2006
, edited by P.
Loaiza
, American Institute of Physics
, Melville, NY
, 2007
, pp. 35
–39
.12.
A.
Pocar
, “Low background techniques for the Borexino nylon vessels
,” in Topical Workshop on Low Radioactivity Techniques: LRT 2004.
, edited by B.
Cleveland
, R.
Ford
, and M.
Chen
, 2005
, vol. 785 of
American Institute of Physics Conference Series
, pp. 153
–162
, arXiv:physics/0503243.13.
A.
Pocar
, Low Background Techniques and Experimental Challenges for Borexino and its Nylon Vessels
, Ph.D. thesis, Princeton University
(2003
).14.
R. W.
Schnee
, R.
Bunker
, G.
Ghulam
, D.
Jardin
, M.
Kos
, and A. S.
Tenney
, “Construction and measurements of a vacuum-swing-adsorption radon-mitigation system
,” in Topical Workshop on Low Radioactivity Techniques: LRT 2013
, edited by L.
Miramonti
, and L.
Pandola
, 2013
, vol. 1549 of
American Institute of Physics Conference Series
, pp. 116
–119
.15.
D.
Grant
, A.
Hallin
, S.
Hanchurak
, C.
Krauss
, S.
Liu
, and R.
Soluk
, “Low Radon Cleanroom at the University of Alberta
,” in Topical Workshop on Low Radioactivity Techniques: LRT 2010
, edited by R.
Ford
, 2011
, vol. 1338 of
American Institute of Physics Conference Series
, pp. 161
–163
.16.
M.
Jiranek
, and M.
Kotrbata
Radiation Protection Dosimetry
145
, 178
–183
(2011
).
This content is only available via PDF.
© 2015 AIP Publishing LLC.
2015
AIP Publishing LLC
You do not currently have access to this content.
