# Presentation: 532513

## SCINTILLATOR HARDWARE 

***DEWELOPMENT AND PLANS***
***Short term LCDmu R&D project for NIU***

***Alexandre Dyshkant, Kurt Francis ***
***for NICADD***
***Northern Illinois University (DeKalb, IL 60115*****)**

- Alexandre Dychkant / Arlington LC Workshop

## GOAL

**Comparative measurements of light output between long strip**
**made from cast and extruded scintillator using WLS and**
**clear fibers as readout**.

***One general goal is that the test bench and hardware development be efficient and useful at the same time for both NIU scintillator-based projects, which are muons and digital hadron calorimeter******.***

**GOAL**

**NOTE:**

- Alexandre Dychkant / Arlington LC Workshop

## DESCRIPTION OF TEST SETUP

***Scintillating strips(details below), WLS fibers embedded into a groove.***
***Optical connectors at strip ends, leading to clear fibers***
***one photo detector at each end.***

**1****st**** step; PMT output connected to picoAmmeter Keithley 6485**
**2****nd**** step: PMT output connected to ADC in VME crate**
**Software: LabView**

**Measurements are to be performed with **
**	****	****-radioactive source Sr-90,**
**	****	****-cosmic rays (top & bottom scintillator **
**	****	****  ****as a trigger**

- Alexandre Dychkant / Arlington LC Workshop

## HARDWARE  ALREADY  IN  PLACE 

**Scintillating strips:**
**	****Two KURARAY SCSN81 (cast scintillator)**
**	****0.93 x 4.73 x 224 cm****3 - call it “narrow”**
**	****0.93 x 9.81 x 224 cm3 - call it “wide”**
***(The plan is to place a single groove on the “narrow” and a ***
***Double groove on the “wide” strip).***
**	****Two MINOS strips (extruded scintillator)**
**	****1.0 x 4.1 x 244 cm****3 - these are coated and grooved**

**WLS fibers – BCF92 (round 1.0 mm outer diameter).**

- Alexandre Dychkant / Arlington LC Workshop

## Narrow strip with one

***Narrow strip with one***
***carved groove .***

***Wide strip with two ***
***carved grooves.***

***WLS fiber***

***Optical connectors***

- Alexandre Dychkant / Arlington LC Workshop

## SCINTILLATING STRIPS WITH GLUED WLS FIBERS

**SCINTILLATING STRIPS WITH GLUED WLS FIBERS**

- Alexandre Dychkant / Arlington LC Workshop

## PMTs

***One Hamamatsu PMT R580-17 (single channel)***
***One Hamamatsu PMT H6568 (sixteen channels****)*

**DAQ**

***VME crate with a 32 channels QDC***
***PC and some software under development***

**Light source**

***Sr-90  (NICADD procuring , with safe and servomiter)***

- Alexandre Dychkant / Arlington LC Workshop

## FIRST STEP OF HARDWARE DEVELOPMENT

- Alexandre Dychkant / Arlington LC Workshop

## Hardware we need in a relatively short term

- Clear fibers and protective tubes if fibers are not light tight.
- WLS fibers (other than the BCF92 round 1 mm outer diameter)
- need for comparison.
- PMTs (need at both ends of optical fibers, plus cosmic triggers)
- 	Two extra Hamamatsu PMT R580-17 (single-channel)
- 				 H6568  (16-channel)
- 				 H7546  (64-channel)
-                                                  2 APDs (32-channel)
*The most critical missing component is the clear fiber.*

- Alexandre Dychkant / Arlington LC Workshop

## NIU PLANS

***Comparison of brightness of extruded and cast scintillating strips.***
***Comparison of response of few thin WLS embedded fibers with one thick WLS fiber embedded in the same scintillating strip.***
***Comparison of uniformity response across  and along the extruded and cast strip.***
***Comparison of response among different WLS fibers for the same scintillating strip and groove.***
***Comparison of response for extruded and machined groove for the same strip.***
***Measurement of responses for different thickness of scintillating strips using the same WLS fiber.***

- Alexandre Dychkant / Arlington LC Workshop