XIII Encontro Nacional de FÃÂsica de PartÃÂculas e Campos.pdf
XIII Encontro Nacional de FÃÂsica de PartÃÂculas e Campos.pdf
XIII Encontro Nacional de FÃÂsica de PartÃÂculas e Campos.pdf
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
- 07 EFEITOS DA BLINDAGEM (Pb) NOS mODuLos. DETETORES DO EXPER'I-<br />
MENTO EASCAMP.<br />
A.R.P.Siral, J.A.Chinellato, A.C.Fauth, E.Kemp, M.A.Leigul O., H.Nogima, R.C.<br />
Rigitano, L.G.dos Santos, E.L.F. da Silva, N.M.Silva, I.C.Souza Jr., E.Tamura,<br />
A.Turtelli Jr. - Universida<strong>de</strong> Estadual -<strong>de</strong> Campinas - IFGW - DRCC.<br />
0 experimento EASCAMP '6 um <strong>de</strong>tetor <strong>de</strong> chuveiros atmosfericos extensos<br />
(CAE) formado por modulus <strong>de</strong> plasticos cintiladores e tubos "streamer". As<br />
direcaes <strong>de</strong> chegada dos CAE's, sae obtidas atraves da tecnica <strong>de</strong> tempo <strong>de</strong> vE50.<br />
Alguns cictiladores foram blindados cum chumbo, barrando assim os eletrons <strong>de</strong><br />
baixa energia da frente dos C.A.E. Sera() apresentados alguns efeitos <strong>de</strong>ssa<br />
blindagem nas medidas <strong>de</strong> dispersao temporal.<br />
P - 05<br />
A REFLEXIVE PHOTODENSITOMETRIC METHOD<br />
FOR STUDY OF NUCLEAR TRACK IN SOLID<br />
(Application to Cosmic Ray Physics)<br />
C.E.Navia, C.R.A.Augusto, F.A.Pinto and H.<strong>de</strong> Castro<br />
Institute <strong>de</strong> Fisica, Universida<strong>de</strong> Fe<strong>de</strong>ral Fluminense<br />
21020 Niteroi, RJ. Brasil<br />
E.H.Shibuya<br />
Instituto <strong>de</strong> Fisica, Universida<strong>de</strong> Estadual <strong>de</strong> Campinas<br />
13081 Campinas, SP. Brasil<br />
This paper report the "so called" reflexive photo<strong>de</strong>nsitometric<br />
method, for observation and study of nuclear track in solid, using a<br />
hand scanner with resolution of 400 dpi (dot per inch) and 256 gray<br />
scale.Special attention is gived to application for cosmic ray showers<br />
observed in emulsion chamber. The calibration, relation between the<br />
gray scale and the shower energy is discussed in <strong>de</strong>tail and some preliminary<br />
results are given to <strong>de</strong>mostrate the technique.<br />
- 09 TESTE DE EFICIENCIA "DE CARTOES LECROY 4200 PARA A EXPERIENCIA MICROSUL -<br />
COLABORA00 MICROSUL*<br />
0 telescOpio <strong>de</strong> muons Microsul, que esta sendo montado no IAG-USP, consta <strong>de</strong> 576 contaaores<br />
tipo "streamer" Iarocci, gerando 1152 sinais que'alimentam 36 cartoes, que constam <strong>de</strong> chips<br />
<strong>de</strong>dicados Mil-2000 e "shift registers" 4021. Um gerador <strong>de</strong> pulsos HP8112 simula o sinal dos<br />
tubos "streamer" e estudamcs a eficiencia dos cartoes em fungi° da largura e amplitu<strong>de</strong> dos<br />
pulsos e do limier do chip. Os xesultados iniciais mostram limites <strong>de</strong> funcionamento dos car<br />
ties diferentes <strong>de</strong>s especificacOes: pulsos <strong>de</strong> largura superior a 15ms e amplitu<strong>de</strong> superior<br />
a 2mv. Sera discutida a correiacao entre largura e amplitu<strong>de</strong> sinless pars limiar fixo.<br />
*Participaram: CBPF: Elly Silva , Nilton Alves, Margaretn Silva; IFUSP: E.W. Hamburger, O.<br />
Dietzsch; IAGUSP: E.J. Pacheco, J.A. Pacheco, L. Galhardo Jr.
Change language