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Title: FVTX Technical Report for P-25

A forward silicon vertex detector (the FVTX) was developed to provide the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL) with precise charged particle tracking at forward and backward rapidity. The requirements that the detector had to meet included (1) ability to track charged particles to a precision of 25 μm in the azimuthal direction and project those particles to a track vertex with the precision of ~100-200 μm (2) noise levels of ~500 electrons or less (3) very low mass detector configuration so that particles traversing the detector are not scattered by material (4) ability to efficiently reconstruct tracks in an environment where the occupancy of the 1- million channel detector reaches a few % (5) radiation-hard electronics in the interaction region where the detector resides. The FVTX, half of which is shown in Figure 1, is composed of two annular endcaps, each with four stations of silicon mini-­strip sensors, covering forward angles of 10°-­ 35° (with respect to the beam line). Each station consists of 48 individual silicon sensors, which contain two columns of mini-strips with 75μm pitch in the radial direction and lengths in the azimuthal φ direction varying from 3.4more » mm at the inner radius to 11.5 mm at the outer radius. The FVTX has approximately 0.54 million strips in each endcap. These are read out with FPHX chips, developed in collaboration with Fermilab, which are wire bonded directly to the mini-strips.« less
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Technical Report
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Atomic and Nuclear Physics; FVTX; silicon detector; PHENIX