(Experimental physics at Yale University: Research proposal and budget Proposal, 1 January 1992--31 December 1996) Page: 90 of 246
This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to UNT Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
90
In 1991, we measured the spectra of light nuclei, and extended the search for strangelets to greater
sensitivities, and to negative charges. The forward spectrometer was subsequently reconfigured and
data measured to larger values of transverse momenta.
We are hoping that there will be some data taking in 1992. At this time we are plan-ing to extend our
measurements of antiprotons to greater sensitivities.
VI.B.2.3. Description of the Apparatus
Figure VI.B.2.3.1 shows the E814 experimental apparatus in a form prior to its reconfiguration in
1991. It features 4ri calorimetry and a forward spectrometer. The target calorimeter (TCAL) and the
participant calorimeter (PCAL) provide measurements of transverse energy. The TCAL consists of
1000 NaI crystals arranged in five walls surrounding the target. The four side walls have a
pseudorapidity coverage of -0.5 < Ti < 0.8 and the back wall covers -2.0 < r < -0.9. The PCAL is
a Pb / scintillator sampling calorimeter that also acts as a collimator for particles entering the forward
spectrometer. Its front face is located 1.22 m from the target. It has an aperture of dimensions 64
mm x 41 mm through which particles enter the forward spectrometer. Charged particle multiplicity
is measured by two disk-shaped Silicon detectors containing 512 pixels each. The detectors have a
combined pseudorapidity coverage of 0.85 < i < 3.8. The forward spectrometer consists of two
dipole magnets, a set of tracking chambers (DC1,DC2,DC3), a scintillator hods . pe (FSCI), and
a set of 25 U/Cu/Scintillator calorimeters (UCAL). It measures the momentum, charge, times of
flight, energy, and charge of the particles traversing it. Its two analyzing magnets have a maximum
fA * di of 6 Tm. The three tracking chambers, located at 3.98 m, 6.90 m, and 11.59 m from the target,
respectively, provide measurements of charged particle positions in the spectrometer, and will be
described in greater detail in section VI.3. The FSCI and UCAL detectors are divided into two
sections each. The section closer to the target is located behind DC3, 12.11 m from the target. The
farther section is located 31.3 m from the target. The closer detectors are further divided into two
sections on each side of the initial beam direction. Under normal magnetic field operation, negatively
charged particles are bent to the detectors on the left, and positively charged particles to the right. The
forward scintillators are vertical plastic scintillator slats (BC404) with dimensions 10 x 120 x 1 cm3
in x, y, and z. The signals from the scintillators are read out by photomultiplier tubes on each end of
the scintillator. This allows the determination of the vertical positions of the particles striking the
detectors from both the pulse-height and time difference measurements. The position resolution thus
obtained is 3 cm, and the timing resolution 300 ps. The UCAL consists of 25 calorimeter modules
Upcoming Pages
Here’s what’s next.
Search Inside
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
(Experimental physics at Yale University: Research proposal and budget Proposal, 1 January 1992--31 December 1996), report, January 1, 1992; United States. (https://digital.library.unt.edu/ark:/67531/metadc1058679/m1/90/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.