Water Targets in Hawaii
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Water Targets in HawaiiWater Targets in Hawaii
Prepared 80 carboys of ultra clean waterPrepared 80 carboys of ultra clean water
Placed carboys along an altitude transect in HawaiiPlaced carboys along an altitude transect in Hawaii
Retrieved 1 set of carboys for Be recovery testing Retrieved 1 set of carboys for Be recovery testing (in progress)(in progress)
Approx. 1.5 yr of exposure remainingApprox. 1.5 yr of exposure remaining
Prepared 1.5 Metric Prepared 1.5 Metric Tons of 18.2 MTons of 18.2 M Water Water in Acid-Leached HDPE in Acid-Leached HDPE CarboysCarboys Provided by NSF/SRC Provided by NSF/SRC
Center for Environmentally Center for Environmentally Benign Semiconductor Benign Semiconductor Manufacturing (fabrication Manufacturing (fabrication water) at U of Awater) at U of A
Includes UV treatment for Includes UV treatment for TOC reduction and TOC reduction and disinfectiondisinfection < 1 ppb TOC< 1 ppb TOC
All trace metals including All trace metals including Be are below 2.5 ppt Be are below 2.5 ppt detection limit of ICPMSdetection limit of ICPMS
Water Targets - PreparationWater Targets - Preparation
Clean room: NSF semiconductor fabrication center for ultra pure water, University of Arizona
Water in CarboysWater in Carboys
Water Targets in HawaiiWater Targets in Hawaii
[Insert map here]
(5) Keck Headquarters(5) Keck Headquarters(Waimea)(Waimea)850 m850 m
(6) UH-Hilo(6) UH-Hilo76 m76 m
(2) Mauna Loa (2) Mauna Loa ObservatoryObservatory3440 m3440 m
(1 )(1 ) Mauna Kea Mauna Kea ObservatoriesObservatories 4190 m4190 m
(3)(3) Mauna Kea Mauna Kea Visitor CenterVisitor Center 2840 m2840 m
(4) Saddle(4) Saddle1740 m1740 m
40 km
Placed on rooftops Placed on rooftops and in open areas and in open areas on the Island of on the Island of HawaiiHawaii
Target RetrievalTarget Retrieval 1 year 1 year
(Recovery Test) (Recovery Test) 3 years 3 years (All Targets)(All Targets)
Mass shielding depth (g cm-2)
600 650 700 750 800 850 900 950 1000 1050 1100
Relative neutron flux or 36Cl production rate
0
2
4
6
8
10
12
14
16
18Relative 36Cl productionmeasured in lava flows(Desilets and Zreda, 2006a, EPSL)
Relative neutron monitor counting rate(Desilets and Zreda, 2006b, EPSL)
Water target site
Mauna Kea summit
Mauna Loa Observatory
Mauna Kea Visitor Center
HumuuluSaddle
Keck Waimea UH
at Hilo
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6
2
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Water Targets in HawaiiWater Targets in Hawaii
Target locationsTarget locations
Mauna KeaMauna Kea
Mauna Kea Observatories
4187 m;8 carboys
Mauna LoaMauna Loa
Mauna Loa Observatory
3439 m;8 carboys
Mauna Kea Visitor’s CenterMauna Kea Visitor’s Center
2842 m;8 carboys
The SaddleThe Saddle
1742 m;1742 m;16 carboys16 carboys
Keck - WaimeaKeck - Waimea
850 m;16 carboys
University of Hawaii, HiloUniversity of Hawaii, Hilo
76 m;76 m;24 carboys24 carboys