PhD Programme hsnResearch Projects
Miniaturized ultra-high vacuum (UHV) package for quantum gravimeters

Miniaturized ultra-high vacuum (UHV) package for quantum gravimeters

Leaders:  Supervisor: Dr.-Ing Marc C. Wurz, LUH, Institute for Microproduction Technology. Co-Supervisor: Prof. Dr. Ernst Rasel, LUH, Institute of Quantum Optics
Year:  2020
Remarks:  Projekt-ID: 95

In co-operation between the Institute for Microproduction Technology (IMPT) and the Institute of Quantum Optics (IQ), so-called atom chips are being developed as components of magneto-optical traps for compact matter wave interferometers. In combination with complex laser cooling, these atom chips generate magnetic field configurations to capture and cool atoms using the Zeeman effect. This is the first step to generate a Bose-Einstein condensate which serves as a test mass for interferometry. In order to be able to use such high-precision matter wave interferometers in the field or on board satellites, miniaturization will be further advanced.

The aim of the PhD thesis is the development of a miniaturized ultra-high vacuum (UHV) package for quantum gravimeters. Currently, the atom chip is installed in conventional vacuum chambers, which, due to their size and weight, are only limited suitable for use in space and in the field. In the course of further miniaturization, the atom chip will be designed as a component of the vacuum system. The main task is to provide the atom chips produced by IMPT with a vacuum package at chip level. The housing is made of glass to ensure optical access. The glass is processed using the so-called laser induced deep etching (LIDE) method, which is developed by the industrial company LPKF. Subsequently, a suitable joining process must be developed to join the package in a vacuum atmosphere at temperatures that are acceptable for the chip structures.

Figure: Atom chip for use in conventional vacuum chambers.