A steerable UV laser system for the calibration of liquid argon time projection chambers


Autoria(s): Ereditato, Antonio; Kreslo, Igor; Lüthi, Matthias; Rudolf von Rohr, Christoph; Schenk, Michael; Strauss, Thomas; Weber, Michael; Zeller, Marcel
Data(s)

13/11/2014

Resumo

A number of liquid argon time projection chambers (LAr TPCs) are being built or are proposed for neutrino experiments on long- and short baseline beams. For these detectors, a distortion in the drift field due to geometrical or physics reasons can affect the reconstruction of the events. Depending on the TPC geometry and electric drift field intensity, this distortion could be of the same magnitude as the drift field itself. Recently, we presented a method to calibrate the drift field and correct for these possible distortions. While straight cosmic ray muon tracks could be used for calibration, multiple coulomb scattering and momentum uncertainties allow only a limited resolution. A UV laser instead can create straight ionization tracks in liquid argon, and allows one to map the drift field along different paths in the TPC inner volume. Here we present a UV laser feed-through design with a steerable UV mirror immersed in liquid argon that can point the laser beam at many locations through the TPC. The straight ionization paths are sensitive to drift field distortions, a fit of these distortion to the linear optical path allows to extract the drift field, by using these laser tracks along the whole TPC volume one can obtain a 3D drift field map. The UV laser feed-through assembly is a prototype of the system that will be used for the MicroBooNE experiment at the Fermi National Accelerator Laboratory (FNAL).

Formato

application/pdf

application/pdf

Identificador

http://boris.unibe.ch/68749/1/1748-0221_9_11_T11007.pdf

http://boris.unibe.ch/68749/8/1406.6400v3.pdf

Ereditato, Antonio; Kreslo, Igor; Lüthi, Matthias; Rudolf von Rohr, Christoph; Schenk, Michael; Strauss, Thomas; Weber, Michael; Zeller, Marcel (2014). A steerable UV laser system for the calibration of liquid argon time projection chambers. Journal of instrumentation, 9(11), T11007. Institute of Physics Publishing IOP 10.1088/1748-0221/9/11/T11007 <http://dx.doi.org/10.1088/1748-0221/9/11/T11007>

doi:10.7892/boris.68749

info:doi:10.1088/1748-0221/9/11/T11007

urn:issn:1748-0221

Idioma(s)

eng

Publicador

Institute of Physics Publishing IOP

Relação

http://boris.unibe.ch/68749/

Direitos

info:eu-repo/semantics/restrictedAccess

info:eu-repo/semantics/openAccess

Fonte

Ereditato, Antonio; Kreslo, Igor; Lüthi, Matthias; Rudolf von Rohr, Christoph; Schenk, Michael; Strauss, Thomas; Weber, Michael; Zeller, Marcel (2014). A steerable UV laser system for the calibration of liquid argon time projection chambers. Journal of instrumentation, 9(11), T11007. Institute of Physics Publishing IOP 10.1088/1748-0221/9/11/T11007 <http://dx.doi.org/10.1088/1748-0221/9/11/T11007>

Palavras-Chave #530 Physics
Tipo

info:eu-repo/semantics/article

info:eu-repo/semantics/publishedVersion

PeerReviewed