1 / 10

Systematic Study of Strip/Block Scintillators: Progress Report

Systematic Study of Strip/Block Scintillators: Progress Report. E.P. Jacosalem, S. Iba, N. Nakajima, H. Ono, A.L. Sanchez, A.M. Bacala & H. Miyata ILCCAL TV Meeting June 13, 2005. Outline:. Background of the study Research Design and Methodology

loman
Download Presentation

Systematic Study of Strip/Block Scintillators: Progress Report

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Systematic Study of Strip/Block Scintillators: Progress Report E.P. Jacosalem, S. Iba, N. Nakajima, H. Ono, A.L. Sanchez, A.M. Bacala &H. Miyata ILCCAL TV Meeting June 13, 2005

  2. Outline: • Background of the study • Research Design and Methodology • Scintillator’s surface covering and length variation • WLS fiber’s length variation • Results • Summary • Future plans

  3. Background of the study • R&D for new calorimeters to achieve accurate measurements of the SM • Accurate & precise measurements require fine segmentation • Fine segmentation can be acquired from small scintillators • Motivated to come up with new calorimeter design

  4. Research Design & Methodology • Trigger : Scintillator (about 1cmx8cmx5mm ) directly connected to PMT • Source : 90Sr (beta-ray) • PMT (sensor) : 16 Ch MAPMT H6568-10, HV : -950V • PMT (trigger) : H3164, HV : -900V • Sensor : Strip type scintillator ( length: 4,8,12, 16cm) Block type scintillator (thickness: 2, 4, 5, 6 and 8mm) • WLS fiber diameter: 1.0mm ; 1.6mm (length: 20, 40, 60, 80, 100, 120, 180, 300 cm) Setup

  5. Research Design & Methodology cont.. 10x40x2mm 10x80x2mm 10x120x2mm 10x160x2mm Scintillator’s surface covering and length variation 3M Reflective Mirror Teflon 10x60x2mm Black Sheet White Paint with Teflon White Paint Surface Covering (1.7mm groove for 1.6mm WLS fiber) Gold Coat • Compare each type using • ADC system • Use WLS fiber with diameter of 1.0mm and 1.6mm • Determine the systematic error White Paint Aluminum Evaporation 10x40x2mm scintillator (1.1mm groove)

  6. Results • 3M reflective mirror has the greatest light yield • PH increasing with scintillator length on 3M reflective mirror, teflon, white paint with teflon and aluminum evaporation. • PH is almost constant with scint length on white paint and black sheet surface coverings. • No comparison for gold coat since cannot do gold coating for strips longer than 40mm.

  7. Results cont.. • 3M reflective mirror has the highest pulse height • PH slightly increases with sensor’s length on 3M reflective mirror, teflon, and white paint with teflon • PH on white paint, aluminum evaporation and black tape are almost constant.

  8. Results cont… • Sensor’s type: • 3M reflective mirror covered 10x40x2mm scint. • varying WLS fiber length • plotted the ln of ADC count to achieve the attenuation length • Attenuation Length • 1.6mm dia = 2.01m • 1.0mm dia = 1.19m

  9. Summary • 3M reflective mirror covered scintillator found to have the greatest pulse height. • Scintillators using 1.6mm WLS fiber had greater PH compared to scintillators with 1.0mm fiber • PH increasing with scintillator length on 3M reflective mirror, teflon, white paint with teflon and aluminum evaporation. • PH is almost constant with sensor’s length on white paint and black sheet surface coverings. • Attenuation Length : • 1.6mm dia = 2.01m • 1.0mm dia = 1.19m

  10. Future plans: • Do ADC measurements for block-type scintillators (thickness varied). • Do ADC measurement for position dependence for strip type scintillator. • Do simulation for light transmission for strip type.

More Related