Positron bunching system for producing positronium clouds into vacuum

被引：7

作者：

Penasa, L. ^{[1
]}

Di Noto, L. ^{[1
]}

Bettonte, M. ^{[1
]}

Mariazzi, S. ^{[1
]}

Nebbia, G. ^{[2
]}

Brusa, R. S. ^{[1
]}

机构：

[1] Univ Trento, Dipartimento Fis, Via Sommar 14, I-38123 Povo, Trento, Italy

[2] Ist Nazl Fis Nucl, I-35131 Padua, Italy

来源：

13TH INTERNATIONAL WORKSHOP ON SLOW POSITRON BEAM TECHNIQUES AND APPLICATIONS (SLOPOS13) | 2014年 / 505卷

关键词：

D O I：

10.1088/1742-6596/505/1/012031

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A magnetic transport line, a magnetic field terminator and a positron buncher were designed and built to focus low-energy positron pulses from a Surko-type accumulator on a porous target. The 25 electrodes buncher, which produces a parabolic potential, was designed to implant 5 ns positron bunches with a spot of 3 mm into a target held at cryogenic temperature. These pulses will be used to obtain cooled Ps clouds into vacuum for laser excitation in spectroscopy experiments. By using high-voltage fast switches and a proper mu-metal shield the requirement to form Ps in a free (magnetic and electric) field region was satisfied compatibly with the request of injecting positrons at energies of 5-9 keV. The optical design, the electrical circuitry of the buncher and the construction solutions of the whole apparatus will be presented and explained.

引用

页数：4

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