Oct 3 – 7, 2022
Science Culture Center, IBS
Asia/Seoul timezone

Expanding RIB Capabilities at the Cyclotron Institute: 3He-LIG Production with an Isobar Separator

Oct 3, 2022, 6:46 PM
S236 (Science Culture Center, IBS)


Science Culture Center, IBS

55 EXPO-ro, Yuseong-gu, Daejeon
Poster Session Poster Session


Dan Melconian (Cyclotron Institute, Texas A&M University)


The primary goal of a new facility, TAMUTRAP, at the Cyclotron Institute,
Texas A&M University, is to look for physics beyond the standard model by
searching for a possible scalar currents contributing to the weak
interaction. In particular, we will measure the $\beta$-$\nu$ correlation
parameter, $a_{\beta\nu}$, in several $T=2$ superallowed $\beta$-delayed proton
emitters initially confined in a novel and unique cylindrical Penning trap.
This trap has been designed to be very large (180-mm inner diameter) so that
$\beta$-delayed protons of up to 4.25 MeV energy are fully contained radially
by the 7-T field of the magnet. As the proton-rich radioactive-ion beams
(RIBs) needed for the TAMUTRAP program are developed at the Cyclotron
Institute, we have commissioned the facility by demonstrating the ability
to perform precise mass measurements using offline ion sources. Once RIB
is successfully produced and transported to TAMUTRAP, we will be uniquely
suited to observe the $\beta$-delayed proton decays of $^{20,21}$Mg, $^{24,25}$Si, $^{28,29}$S, $^{32,33}$Ar and $^{36,37}$Ca
with $4\pi$ collection of the $\beta$s and delayed protons.

In order to produce the proton-rich RIBs for TAMUTRAP,
a new production target and beamline is being constructed at the Cyclotron
Institute. The high-intensity primary beam of $^3$He from the K150
cyclotron will impinge on a heavy target with the reaction products collected
and extracted using the light-ion guide (LIG) technique. Following this we
have designed LSTAR, a compact, high-resolution isobar separator to purify
the RIBs in order to prevent overloading TAMUTRAP's RFQ cooler and buncher
with contaminants.

An overview of the He-LIG and LSTAR systems and their expected performance
will be presented, largely within the context of the TAMUTRAP science

Primary authors

Dan Melconian (Cyclotron Institute, Texas A&M University) George Berg (U. Notre Dame) Dr Praveen Shidling (Cyclotron Institute, Texas A&M University) Manoel Couder (U. Notre Dame) Maxime Brodeur (University of Notre Dame) Dr Grigor Chubarian (Cyclotron Institute, Texas A&M University) Dr Veli Kolhinen (Cyclotron Institute, Texas A&M University) Dr Gabi Tabacaru (Cyclotron Institute, Texas A&M University)

Presentation materials