Joint Actinide Shock Physics Experimental Research (JASPER) Facility Update Page: 2 of 7
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54 h Meeting of the Aeroballistic Range Association
Santa Fe, New Mexico, USA, October 20-24, 2003
To date the gun (28mm/89mm) has launched projectiles ranging in mass from 14.6 grams
to 68 grams and velocities from 2.1 km/sec to 7.6 km/sec. The facility was declared
operational this year for actinide targets and has successfully conducted Equation of State
experiments on Plutonium targets.
The JASPER Facility will support the following Campaigns:
1. Campaign 1: Primary Certification - JASPER data will be an important
component of the tools required to certify the performance and safety of any
rebuild or aged primary.
2. Campaign 2: Dynamic Material Properties - JASPER will provide materials
response data used in the development of EOS and strength models for Special
3. Campaign 8: Material Lifetimes - JASPER will help provide a validated basis for
determining when components must be replaced and when new manufacturing
facilities are required.
Two-Stage Light Gas Gun Operational Characteristics and
The JASPER Two-Stage Light Gas Gun, see table #1, consists of a two-piece 89 mm bore Pump
Tube that is normally charged to 16 bar (232 psig) Hydrogen gas which is maintained to 1 psig
of requested fill pressure by the Control System. The Acceleration Reservoir (AR) is a two-
piece sleeve design pressed together. It has a 3.9 half angle and is designed to operate with two
5 ksi break diaphragms or one 10 ksi diaphragm with scores on both surfaces. For low velocity
shots one 5 ksi break diaphragm can be used with a spacer ring. The launch tube is a single
piece barrel; 8.1 meters long with a nominal 28 mm bore.
Table 1: Two-Stage Light Gas Gun Characteristics
Pump Tube 11.5 meters long 89 mm bore 4.5 kg Piston
Launch Tube 8.1 meters long 28 mm bore 2.4 - 7.4 km/sec
Acceleration Reservoir Sleeved Design Pressure gauge in Assembled
petal valve holder Hydraulically
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Conrad, C. H.; Miller, J.; Cowan, M.; Martinez, M. & Whitcomb, B. Joint Actinide Shock Physics Experimental Research (JASPER) Facility Update, article, October 1, 2003; Nevada. (digital.library.unt.edu/ark:/67531/metadc734001/m1/2/: accessed August 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.