a short “physical” self introduction i’m naotaka naganawa from nagoya university. i’d been...

A short “physical” self introduction

I’m Naotaka Naganawa from Nagoya University.

I’d been working for emulsion development and compatibility between it and lead or other materials for about 5 years.

Last year I succeeded the sheeting machine from my colleagues and established the flow of emulsion handling at Tono scanning lab.

At the same time, I was working on “location” of neutrino event.

Dec.2008 and the beginning of this year, I stayed at LNGS for brick handlingshift.

Now my colleagues and I simplified procedures of emulsion handling as we present here.

And now I’m ready to enjoy decay analysis.

I’m really enjoying this good collaboration in OPERA with you.Thank you …

Improvement /simplification on Emulsion handling before scanning

Team (Ishiguro + Naganawa + Nakatsuka)

N. Naganawa 2009 01 20

for breaking into Decay Analysis

Packing and Shipping of Developed filmsfrom LNGS

Current flow of emulsion handling before scanning

Qualitychecking Sheeting

CS scanning

ECC scanning

Order checking

(details explained later…)

Till now, for 2008’s RUN, 687 CS doublets arrived and they were all sheeted. And 337 ECCs arrived, 263 of them were sheeted.

We’ve been doing this with organizing shifts.

And now it’s time for decay search.

We wanted to reduce the number of shifters and increase thenumber of people moving onto decay search. So we improved/simplified these procedures and made it Possible.

Packing and Shipping of Developed filmsfrom LNGS

Current flow of emulsion handling before scanning

Nakatsuka’s talk

Ishiguro’s talk

Qualitychecking Sheeting

CS scanning

ECC scanning

Order checking

Packing and sending from LNGS

A trial of new method for saving time and better quality

Previous way

Tipical problem… Separator bends.

Fold a separator. Put a film between it.

Put them into a card holder.

Separator: made of PP, mat treated surface on one side.

New trial

With this way, separator does not bend.

We don’t fold separators this time.Just put a film between 2 separators.

Bind up and fix them.

Repeat that and pile them up.

H.Rokujo (Kobe)@LNGSputting into a box

As a result,…

Packing time : 30min / brick 15min / brickQuality : separator not bending.

Self Introduction

Nakatsuka Yuji4th grade student of Nagoya UniversityI Joined to F laboratory last spring,So, learning way of experiment, emulsion handlin

g, CS manual checking, SCAN BACK, and shift of SCANNING, decay searching.

I now mainly doing emulsion handling.

Yorosiku Onegaisimasu.

Improvement on Quality and Order Check

Nakatsuka Yuji F laboratory Nagoya University

Aim:Check Quality of CS and ECC to find problems for smoothly SCANNING.

Philosophy:In order to make time for analysis, improveprocess as simpler.

Film arrival→Set films into a rack with the ID number card.

Confirm the ID of CS/ECC

ID number card

Stabilization of the thickness

Set Racks into Shelf. →Leave them for more than 4 hours.

Thickness stabilized in the humidity of the room.

Checking Point of Film

☆ Check problem for scanning

○X-ray mark position

○damage ●light leak ●defect ●glycerin drop....etc

Checking Point of Film

☆ Check problem for scanning

○X-ray mark position

○damage ●light leak ●defect ●glycerin drop....etc

CS X-ray

ECC X-ray

CheckingSheet

Check especiallythe part wheretrack may exist.

Thickness Check (by weight checking)

• Check weight of film to know thickness of film.(39~45μm)

• No Sheeting for abnormal thickness film.

Thickness / Weight (R.H.=20± 5 %)

y = 34.543x - 124.35

32

34

36

38

40

42

44

46

48

50

52

4.500 4.550 4.600 4.650 4.700 4.750 4.800 4.850 4.900 4.950 5.000

Weight [g]

Thic

knes

s [m

icro

n]

single double refr (single double refr)線形

Weight-thickness relation

Order checkOrder check of emulsionplates inside ECC; By use ECC X-ray,check structure of films and leads of ECC. Measure distance ⇔

Minimum Order Check method

☆If only needed, only minimum plates.

before minimized 1 ECC 57 plates 5~10 platestime ~30 minutes ~5 minutes10 ECC time:~5 hour → ~50 minutes

Plates for VOLUME SCAN:5~10 plates

Some plates around the one which the track stop at by SCAN BACK: ~5 plates

Reducing number of checking plates as keep quality.

Summary

time / 1ECCFilm Setting ~15 minuteDrying 4~ hourQuality Checking and Thickness(Weight) Checking ~20 minuteOrder Check 5~10 minute

●Prepare film for sheeting that has no problem to SCAN.

●We have to trying to simplify and good method, deciding as keep close contact with other teams.

●We want to do analysis about decay searching. So shorten time of working and number of person,but as keep quality.

ＩＳＨＩＧＵＲＯＫＡＴＳＵＭＩ

• ４ｔｈ　 grade of Nagoya, F

• Have done with Manual check ,ScanBack ・・・ all work from film arrival to decay analysis

・ I’am doing ＥＭ　 work , Today ,talk Sheeting

Sheeting

Speaker Ishiguro

Naganawa

Nakatsuka

Team in Flab

able to lock-on Decay analysis

philosophy

・ Sheeting speed improve without quality down

ＣＳ sheeting ＥＣＣ sheeting

・ Scan till edge

・ Quick PL change with 　　 Plate 　 changer・ keep film in order

Meaning of sheeting

・ Scan till edge＋

sheeting machine

Built by Hoshino Kazuyama Oya

( )

Main tape

Side tape

Film 　 on belt

Improved by Ishiguro nakatsuka naganawa

ECC sheetingCS sheeting

ID sheet , cut after sheeted

Completedfigure

Solve ｄ problem

Sidetape dancing Machine eat film and film bend

Speed and quality down Needed one more person

Stabilize side tape Stop motor automatically

solved guide side tape and arms

sensor with Hg tumbling switch

built by ishiguro nakatsua( )

Higher speed+ No fail

Enabled 1 man sheeting

25min with 2person 　⇒ 10min 1person

+ achieved higher quality

・ speed up

1ECC15CS

8ECC

12CS

Daily work

+ 7.5 hour×human/day⇒1.5 hour×human /day

Save 6hour×human / day

Improvement

past now

・ We can finish all EM work of 8E ＣＣ and 12 CS/day , continuously

Ordercheck save 1.5h

qualitycheck save 3.5h

sheeting save 6h

summary

}save 11h ・ human/ day

able to lock-on Decay search .

16hour×human/day⇒ ５ hour ・ human/Day

Comment on quality of developed emulsion

Most of emulsion was good for scanning in our lab.The only crucial problem we had recently was ….

In November and December we received 17 bricks with emulsion which were thin by about 10 micron from usual ones. This was because of the mixing problem of glycerin solution which happened 1 time, but this problem was already fixed by developing team.

N. Naganawa

Overall Summary

Preparation of film before scanning consists of packing and shippingdeveloped films, quality and order checking, and sheeting.

The only crucial problem we had in emulsion quality was that of thin films which was understood as the result of mixing problem of glycerin solution atLNGS and this problem was already fixed by developing group.

Up to now, 687 CS doublets arrived and they were all sheeted.And 337 ECCs arrived, 263 of them were sheeted.

N. Naganawa

Those procedures were improved/simplified with keeping their quality.Now they are quick enough that we can follow right after the beam exposure.

Much more, we could reduce the amount of job to 1/3, and the number of people. And became to be able to go on to Decay search.