MI-8 Target Systems Service BuildingThe MI-8 building servived as the access and support building for the Main Injector underground enclosure at the 8 GeV injection point. It is now the main service building for building and testing the target system devices for the neutrino and muon experiments.
MI-8 houses various machines used to build and test the targets and horns including advanced tools like a CNC circumferential TIG welder, horn test stand and 3D printers. Finished components are transported from MI-8 to MI-65 and lowered into the Target Hall chase, shown below:
Horn testing prior to installationHorn pulse test stand provides electrical current pulse and cooling for testing of completed horns.
- Utilized for horn QA verification of fabrication and assembly through a test period of 100,000 pulses and subsequent magnetic field mapping QA to assure meeting magnetic field uniformity requirements;
- 200 kA peak current with pulse width of 850 Ásec;
- typical test cycle times of 1.33 sec and 1.89 sec.
NOvA target under fabricationNOvA target produces secondary pions through proton beam interactions with graphite target fins.
- The main target consists of 47 vertical graphite target segments, each 20.0 mm long x 6.4 mm wide, with 0.3 mm spacing between segments, for a total length of 95.38 cm;
- The target material is graphite, type ZXF-5Q (POCO Graphite), density 1.78 g/cm3;
- The target is water cooled via stainless steel lines at the top and bottom of each fin and is contained in an aluminum vacuum can with beryllium windows;
- It is designed to operate at 700 kW incident proton beam power, 1.33 sec cycle time, 4.9E13 protons per pulse, to produce neutrino spectrum peak at ~ 2.5 GeV.
Mu2e target remote handling systemThe Mu2e pion production target is mounted from a low-mass support structure with spring-loaded clamps and handling lugs that form part of the remote handling system.
The remote handling system incorporates a cask, a disposable interface tooling, contamination-containment box that the target is pulled back into, a long arm to reach out 13ĺ to target, arm end de-coupling system, kinematic mounts, and X-Y-Z servo positioning axes plus pneumatic motions.
3D printers3-D printers are used to produce parts used in target systems. Works with numerousámaterials, including Clay, Plasticine, Sugru, Silicone RTV, porcelain, ABS, PLA, Nylon, NinjaFlex, FilaFlex and more.
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