PAPER / ARXIV:2609.09843

Operation of a negative ion gas time projection chamber without electronegative fill gases

Lachlan J. McKie , Lindsey J. Bignell , Nicholas Adams , Victoria U. Bashu , Ferdos Dastgiri , Gregory J. Lane

Instrumentação e métodos para astrofísica · cruzada Física de altas energias: experimento · cruzada Instrumentação e detectores

RESUMO

The high fidelity reconstruction of particle tracks in micropatterned gaseous time projection chambers renders this technology ideal for future rare-event searches, including direction-sensitive dark matter experiments. Large drift distances are typically required for such experiments, so that the overall spatial resolution is limited by diffusion. Negative ion drift exhibits lower diffusion than electron drift and is thus an attractive option for realising a large-scale detector. The use of electronegative gases to create negative ions introduces technical challenges, most notably a reduction in gain when compared to conventional gas mixtures. In this study, we demonstrate a new method for negative ion generation via dissociative electron attachment using the conventional molecular fill gas CF$_4$. Our optical measurements of negative ion drift indicate electron attachment lengths of $<$1 mm and comparable gain to electron avalanches. The individual negative ion avalanches were also time-resolved, allowing the number of ions reaching the readout to be counted. We measure an improved energy resolution by single ion counting, relative to an integrated electron avalanche signal measured under identical gain conditions.

NO MESMO MAPA

Papers relacionados

physics.ins-det18 de set. de 2026

Mineral Detection of Neutrinos and Dark Matter 2026 Proceedings

Alexey Elykov , Patrick Stengel , Natsue Abe , Daniel Ang , Lorenzo Apollonio , Levente Balogh , Laura Baudis , Chinmay Bharathulwar , Priyanshu Bhattacharya , Yilda Boukhtouchen , Joseph Bramante , Vincent Breton , Andrew Buchanan , Jens Burkhart , Lorenzo Caccianiga , Andrew Calabrese-Day , Mason Camp , Jordan Chapman , Anson Cook , Reza Ebadi , Denis Erkal , Katherine Freese , Audrey Fung , Shota Futamura , Claudio Galelli , Kevin Gao , Peter W. Graham , Thomas Haddock , Minako Hashiguchi , Alexander Hayes , Adam A. Hecht , Samuel C. Hedges , Shigenobu Hirose , Luisa M. Hötzsch , Patrick Huber , Yohei Igami , Vsevolod Ivanov , Florian Jörg , Ayuki Kamada , Takenori Kato , Yoji Kawamura , Katharina Kehl , Chris Kelso , Holger Kluck , Emilie M. LaVoie-Ingram , Matthew Leybourne , Gavishta H. M. Liyanage , Thalles Lucas , Brenden A. Magill , Paolo Magnani , Jennika McIntosh , Naoki Mizutani , Kohta Murase , Tatsuhiro Naka , Lina Necib , Pranav Parvathaneni , Andre Peterson , Zachary S. C. Picker , Rabeya Rabu , Harikrishnan Ramani , Anupam Ray , Morteza Roostaeinia , Hannah Ross , Issei Saikyo , Lukas Scherne , Maximilian Shen , Aaron Shugar , Joshua Spitz , Kai Sun , Jiashen Tang , Erwin H. Tanin , Dionysios P. Theodosopoulos , Yoichi Usui , Pieter Vermeesch , Aaron Vincent , Ronald Walsworth , Jin-Wei Wang , David Waters , Samuel S. Y. Wong , Audrey Wu , Gregory Wurtz , Wen Yin , Xiuyuan Zhang , Zhexian Zhang

Operation of a negative ion gas time projection chamber without electronegative fill gases

Papers relacionados

Mineral Detection of Neutrinos and Dark Matter 2026 Proceedings

Design and characterization of large-size monolithic layers of 3D-segmented plastic scintillator

A heterogeneous and vectorized sequence for the HL-LHC full tracking reconstruction of the CMS experiment

Particle Physics Driven by Quantum Technology - Quantum Simulations and Quantum Sensing

Proposing, never assigning: fair allocation of control-room shifts in experimental particle physics collaborations from ranked wishes under institutional quotas

Commissioning and Performance of the Time-of-Flight Detector for the T2K Neutrino Oscillation Experiment