Resistive RAM ( Resistive RAM (ReRAM) Technology ) Technology ...
CBM -Russia meeting, ITEP, 5 November 2004 DEVELOPMENT OF LOW RESISTIVE GLASS FOR HIGH RATE RPC...
-
Upload
emory-dominick-griffith -
Category
Documents
-
view
213 -
download
0
Transcript of CBM -Russia meeting, ITEP, 5 November 2004 DEVELOPMENT OF LOW RESISTIVE GLASS FOR HIGH RATE RPC...
CBM -Russia meeting, ITEP, 5 November 2004
DEVELOPMENT OF LOW RESISTIVE GLASS FOR HIGH RATE RPC
F.Guber, INR, Moscow
C B M
Schematic view of the TOF
- Total area about 130 sq. m.-Standard material properties sufficient for ~ 70% of solid angle- Different concepts for different polar angles
Hit rate and densities for Au+Au collisions at 25 GeV/n (rates – 10 MHz min. bias collisions, hit density for central collisions)
Window glass
Properties of different kind of materials
Window glass Semiconductive glass
Bakelite
(·cm)
1012 - 1013
108 - 1011
109 – 1012
Mass production
yes No(no market)
yes
Surface quality
good good no
Stability with freons
Some problems bad good
Type of conductivity
ion electron ion
Polarization
yes no yes
Semiconductive glasses – phosphate glasses, - silicate glasses, - vanadium glasses
Yu.Pestov, NIM A494(2002)447
Progress in the low resistive glass development
- development of glass samples with resistivity near 109Ωcm (special semiconductor “black” (phosphate) glasses ) and production of the glass samples 30 x30 x 5 mm3 ; - production of few plates 100 x 100 x 2 mm - construct prototype RPC detector
- tests on the beam test of RPC prototype in ITEP (Results have been presented by A.Smirnitsky– previous report)
The work has been done in the close cooperation between INR, ITEP and IHEP
Low Resistive Glass for first RPC Prototype
- Phosphate glass- electron conductivity- low resistive
Problem – difficult formass production
U=1000v
First sample of phosphate low resistive glass
Plates produced by cut and polishing from glass block,
size 100 x 100 x 2 mm
Silicate glasses- few samples 30 x 30 x 5 mm are available- low resistivity- more technological for industrial production
Problems to be solved: - development of the technology of glass block production (regimes of heating and cooling, crystallization problems etc.) - very aggressive melt - needs special crucible from platinum - development of large sizes glass sheets production method
U = 1 kV
The nearest plans
- to produce low resistive silicate plates 100 x 100 x 2 mm, - to construct new RPC prototype from these plates, - test the RPC prototype on the ITEP test beam, December 2004 ? (INR-ITEP-IHEP) - production of silicate glasses by semi industrial way (by extraction from glass melt) the plate with size about 1000 x 200 x (1-2) mm and with the thickness even less than 0.5 mm - to write the contribution for the Technical Proposal
Long-range plans of INR team
-Development of low resistive glasses for production of high rate RPCs,- New type of detectors for TOF (APDs -??)