Journal Article/Contribution to a conference proceedings

FZJ-2026-03144

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Status of the polarized gas target for the LHCspin project

Doshita, N. (Corresponding author) ; Ciullo, G. ; Iwata, T. ; Di Nezza, P. ; Engels, R. W.FZJ* ; Lenisa, P. ; Miyachi, Y. ; Pappalardo, L. L. ; Parsamyan, B. ; Nass, A.FZJ* ; Shankar, R.

2026

Abstract: The LHCspin project is a future experimental project to install a polarized gas target within theLHCb detector at CERN Large Hadron Collider (LHC) in order to study the internal (spin-)structure of protons and neutrons. A key requirement of the project is the development of ahigh-performance polarized target system, which consists of three major components: an AtomicBeam Source (ABS), a target chamber, and a polarization measurement system. The projectis structured in two phases. Phase I focuses on the development of the new target system andconducting feasibility tests and preliminary measurements at the LHC Interaction Region 4 (IR4)during LHC Run 4. In Phase II, the developed target system is foreseen to be integrated into theLHCb detector at IR8 to make use of new probes in a poorly explored kinematical region for theprecise measurements of quark and gluon distributions.

Keyword(s): Nuclei and Particles (1st) ; Nuclear Physics (2nd)

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Contributing Institute(s):

1. Experimentelle Hadrondynamik (IKP-2)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)

Appears in the scientific report 2026

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