6533b820fe1ef96bd12791d7
RESEARCH PRODUCT
The liquid-argon scintillation pulseshape in DEAP-3600
N. J. T. SmithV. StricklandV. StricklandM. BatygovB. LehnertJ. B. MclaughlinJ. B. MclaughlinK. DeringI. N. MachulinI. N. MachulinP. Garcia AbiaT. PollmannJ. F. BuenoD. GoeldiC. NgR. SantorelliJ. M. CorningP. SkensvedD. GallacherJocelyn MonroeM. WaqarE. A. GarcésF. La ZiaM. KuźniakM. KuźniakC. RethmeierLaurelle Maria VeloceMiguel Cárdenas-montesG. FiorilloStefano CavuotiT. Sánchez-pastorMark Guy BoulayMark Guy BoulayP. PasuthipC. HearnsF. RetiereC. J. JillingsC. OuelletC. NantaisB. SmithBei CaiBei CaiE. Vázquez-jáureguiE. Vázquez-jáureguiO. KamaevM. C. PiroC. StoneN. LevashkoN. LevashkoA. ButcherS. WesterdaleDarren GrantP. GiampaP. GiampaF. A. DuncanB. BroermanB. BeltranN. SeeburnO. LitvinovP. NadeauA. JoyX. LiMonica DunfordT. SonleyS. VielA. L. HallinV. PesudoS. J. M. PeetersN. FatemighomiR. FordP. AdhikariE. Sanchez GarciaGiuseppe LongoJ. WaldingP. MajewskiA. KempG. KaurR. AjajR. MehdiyevA. IlyasovA. IlyasovS. LangrockP. GorelB. T. ClevelandMartin WardC. MielnichukBhaskar SurC. E. BinaG. R. AraujoP. J. HarveyI. KochanekJ. LockA. Zuñiga-reyesS. J. DaughertyA. ErlandsonA. ErlandsonJ. WillisLuca DoriaS. PalS. GargE. T. RandV. V. GolovkoT. McginnT. McginnT. McelroyR. StainforthP. Di StefanoA. GrobovA. GrobovK. GrahamA. B. McdonaldY. ChenA. FlowerA. FlowerM. StringerA. J. NobleG. OliviéroM. HamstraM. HamstraR. Gagnonsubject
PhotomultiplierPhysics - Instrumentation and DetectorsPhysics and Astronomy (miscellaneous)Physics::Instrumentation and DetectorsDark matterFOS: Physical scienceslcsh:AstrophysicsScintillatorWavelength shifter01 natural sciencesParticle detectorDEAPOptics0103 physical scienceslcsh:QB460-466lcsh:Nuclear and particle physics. Atomic energy. Radioactivity010306 general physicsEngineering (miscellaneous)PhysicsScintillation010308 nuclear & particles physicsbusiness.industryInstrumentation and Detectors (physics.ins-det)Scintillation counterlcsh:QC770-798businessdescription
AbstractDEAP-3600 is a liquid-argon scintillation detector looking for dark matter. Scintillation events in the liquid argon (LAr) are registered by 255 photomultiplier tubes (PMTs), and pulseshape discrimination (PSD) is used to suppress electromagnetic background events. The excellent PSD performance of LAr makes it a viable target for dark matter searches, and the LAr scintillation pulseshape discussed here is the basis of PSD. The observed pulseshape is a combination of LAr scintillation physics with detector effects. We present a model for the pulseshape of electromagnetic background events in the energy region of interest for dark matter searches. The model is composed of (a) LAr scintillation physics, including the so-called intermediate component, (b) the time response of the TPB wavelength shifter, including delayed TPB emission at $${\mathcal {O}}$$O(ms) time-scales, and c) PMT response. TPB is the wavelength shifter of choice in most LAr detectors. We find that approximately 10% of the intensity of the wavelength-shifted light is in a long-lived state of TPB. This causes light from an event to spill into subsequent events to an extent not usually accounted for in the design and data analysis of LAr-based detectors.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-04-04 | European Physical Journal C: Particles and Fields |