Introduction
A widely distributed commercially available target station for the irradiation of solid targets is the COSTIS system. The system is specified for beams up to 500 W and is equipped with a front side He-cooling and water cooling on the back side. The target itself has a coin shape with a diameter of 24 mm and thickness of 2 mm. This recommends the system for irradiation of thin targets like foils but it is also useable for irradiation of metal and oxide powders. However the irradiation of powders and granulates is limited due to the dimension of the target capsule. A setup of a capped closed target is hardly achievable. The purpose of this work was the modification of the COSTIS target station for the use of thicker target capsules. This shall enable the more easy and safe handling and irradiation of powdery targets and the use of lockable target capsules.
Material and Methods
The adaption of the COSTIS system for wider targets is easy and fast achievable by the ex-change of the target guiding plate together with the four distance bolts and their bearings. The effort of the replacement of the standard with the modified parts is comparable with COSTIS maintenance including exchange of the window foil and the O-rings. For the target capsule itself different designs were developed and tested. Now various target capsules are available, depending on required energy, handling needs and properties of the target material. Different locking systems can be used, from “click” capsules to screwable systems. Additionally the tightness of the target capsule can be achieved by placement of on O-ring between the lid and capsule body.
Results and Conclusion
The wider target body allows the capping of the target material. This enables a wide range of applications. One aspect is the nanoparticle research, where radiolabelling is an excellent tool for in situ online investigations. The chosen design of the target capsule allowed the direct activation of TiO2 nanoparticles. Via the nuclear reaction 48Ti(p,n)48V radiolabelled [48V]TiO2 nanoparticles can be obtained. Another example is the use of recoil effects for radiolabelling of nanoparticles. In this case the kinetic energy of the product of the nuclear reaction 7Li(p,n)7Be is used to implant a radioactive tracer in different nanomaterials like Ag0 – nanoparticles and MWCNT (multi wall carbon nano tubes). In general the irradiation of powders and granulates benefits from the modified design that allows the more flexible adaption to experimental needs.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:22257 |
| Date | January 2015 |
| Creators | Franke, K. |
| Contributors | Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany |
| Publisher | Helmholtz-Zentrum Dresden - Rossendorf |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | doc-type:conferenceObject, info:eu-repo/semantics/conferenceObject, doc-type:Text |
| Source | WTTC15 |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | urn:nbn:de:bsz:d120-qucosa-162048, qucosa:22221 |
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