Mainz 2022 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 4: Radiation Generation and Applications

AKBP 4.6: Talk

Monday, March 28, 2022, 17:15–17:30, AKBP-H14

Investigation of irradiation damage in Ti6Al4V via high-energy x-ray diffraction — •Tim Lengler^1,4, Dieter Lott¹, Gudrid Moortgat-Pick^2,4, Sabine Riemann³, Andrey Ushakov², Emad Maawad¹, Andreas Stark¹, and Peter Staron¹ — ¹Institute of Material Research, Helmholz-Zentrum Hereon, 21502 Geesthacht, Germany — ²Deutsches Elektronen-Synchrotron (DESY), 22607 Hamburg, Germany — ³Deutsches Elektronen-Synchrotron (DESY), 15738 Zeuthen, Germany — ⁴Universität Hamburg, 20148 Hamburg, Germany

For the positron source of the International Linear Collider (ILC) the choice of a suitable target material is crucial. The material must resist the high cyclical load, which is induced in the target while creating about 10¹⁴ positrons per second. One of the most promising targets consists of the titanium alloy Ti6Al4V. For realistic feasibility tests, several thin plates of the alloy were subjected to an intense electron beam at the Mainzer Microtron.

In this work, we report about the investigation of the irradiated material via High Energy X-Ray Diffraction (HEXRD) at the Hereon endstation of the P07 beamline at DESY. Changes in the crystallographic properties and phases due to the treatment were examined since these may compromise the longevity of the material. Additional tests were performed, where the thermal component of the cyclical load was realized in a quenching dilatometer and again examined via HEXRD. The results will be discussed here.