The Belle II silicon vertex detector
PBN-AR
Instytucja
Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego Polskiej Akademii Nauk
Informacje podstawowe
Główny język publikacji
en
Czasopismo
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN
0168-9002
EISSN
Wydawca
DOI
URL
Rok publikacji
2013
Numer zeszytu
Strony od-do
83-86
Numer tomu
732
Identyfikator DOI
Liczba arkuszy
Autorzy
Pozostali autorzy
+ 55
Autorzy przekładu
(liczba autorów przekładu: 0)
Słowa kluczowe
en
Silicon
Vertex detector
Belle II
Origami
Streszczenia
Język
en
Treść
The KEKB machine and the Belle experiment in Tsukuba (japan) are now undergoing an upgrade, leading to an ultimate luminosity of 8 x 1035 cm(-2) s(-1) in order to measure rare decays in the B system with high statistics. The previous vertex detector cannot cope with this 40-fold increase of luminosity and thus needs to be replaced. Belle II will be equipped with a two-layer Pixel Detector surrounding the beam pipe, and four layers of double-sided silicon strip sensors at higher radii than the old detector. The Silicon Vertex Detector (SVD) will have a total sensitive area of 1.13 m(2) and 223,744 channels twice as many as its predecessor. All silicon sensors will be made from 150 mm wafers in order to maximize their size and thus to reduce the relative contribution of the support structure. The forward part has slanted sensors of trapezoidal shape to improve the measurement precision and to minimize the amount of material as seen by particles from the vertex. Fast-shaping front-end amplifiers will be used in conjunction with an online hit time reconstruction algorithm in order to reduce the occupancy to the level of a few percent at most A novel "Origami" chip-on-sensor scheme is used to minimize both the distance between strips and amplifier (thus reducing the electronic noise) as well as the overall material budget. This report gives an overview on the status of the Belle II SVD and its components, including sensors, front-end detector ladders, mechanics, cooling and the readout electronics
Cechy publikacji
peer-reviewed
original-article
Inne
System-identifier
25777
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