Speaker
Description
The proof-of-principle (PoP) experiment of the Multi-Ion Reflection Apparatus for Collinear Laser Spectroscopy (MIRACLS) has demonstrated novel experimental techniques for laser spectroscopy and Multi-Reflection Time-of-Flight (MR-ToF) mass spectrometry [1]. Certain developments in this low energy MR-ToF device (≈1.5 keV), however, were limited by instabilities of high-voltage sources. In particular, even small fluctuations in the high voltages applied to the electrodes of the sensitive electrostatic mirrors result in a degraded resolving power of the mass spectrometer. Also the resolution of collinear laser spectroscopy can be limited by power-supply instabilities, which can change the energy of the trapped ions resulting in a broadening of the laser-spectroscopic line shape. Therefore, we have now implemented passive as well as active voltage-stabilization features in the MIRACLS PoP setup, following the recent implementations at ISOLTRAP [2] and at Greifswald [3].
This poster will introduce our approaches for voltage stabilization and report on the improved performance in the test measurements with MIRACLS' PoP setup. An outlook on the voltage stabilization for MIRACLS' upcoming 30-keV device will be given, which also represents the prototype of the future ISOLDE general-purpose MR-ToF mass separator.
[1] F. Maier et al., Hyperfine Interact. 240, 54 (2019),
S. Lechner et al., Hyperfine Interact. 240, 95 (2019),
S. Sels et al., Nucl. Instr. Meth. Phys. Res. B 463, 310 (2020),
V. Lagaki et al., Acta Physica Polonica Series B 51, 571 (2020)
[2] F. Wienholtz et al., Nucl. Instrum. Methods Phys. Res. B 463, 348-356 (2020)
[3] P. Fischer et al., Rev. Sci. Instrum. 91, 023201 (2020)