Conceptual Designs of Station #1 and #3 for MuonTracking

D.M.Lee
Present the conceptual design and the issues that contributed to the design. Outline the results of the local engineering design review and the changes that resulted. Discuss present and future planes.

Present the initial start for the conceptual design for station 3. Define differences in approach from station 2. Discuss future plans.

Station #2 Prototype Status

D.M.Lee
Discuss the present schedule of activities for the station 2 prototype. Outline problem areas and expected dates for the beginning of testing. Present calibration data for the leadscrews and discuss how we expect to use the data.

Station 2 Chamber Mounting Scheme

R. Martin or D.M.Lee
Discuss the recommended mounting scheme for station 2. Include finite element analysis and frequency analysis. Outline changes to the chamber design to allow for the octants to fit into the magnet and the requirements that are incorporated for the alignment requirements.

Design requirements and initial thoughts on Muon Tracking FEE

D.M.Lee
A set of specifications for the front end electronics will be discussed.

Muon Alignment Status

M. Brooks
A summary of the simulations that were used to determine the muon tracking alignment requirements will be presented along with the final requirements that have been given to the alignment task force. In addition, the present status of the alignment hardware that is used in the foil etching will be given, and the status of the straightness monitor test stand will be presented. Preliminary results on the analysis of a sample etching should be available as well as some preliminary results from a straightness monitor stand that has begun to collect data.

Recent Progress in South Muon Magnet Fabrication

Takashi Ichihara or Naohito Saito
The recent activities toward the decision of the fabrication of south muon magnet will be presented. The constraint of the total RIKEN budget (phase I) and fabrication techniques will be discussed.

Simulation Study of the muon LEVEL-1 trigger

Naohito Saito
The trigger efficiency and background rates have been studied. The comparison between PAD readout configuration and simple HODOSCOPE readout will be made.

Mechanical layout of x-y hodoscopic mu-ID readout

F. Plasil
Given that the final decision may very possibly be made in favor of a x-y hodoscopic wire readout (replacing the planned pad readout), a possible mechanical layout will be presented. The goal is to cover the entire active area with both vertical and horizontal LST's. In addition, for purposes of efficiency and readout speed, staggered LST's will be used. Thus, in each gap of the mu-ID steel, coverage will be provided mostly by four layers of LST's except in panel overlap regions, where as many as eight layers may be present. There will be three different panel sizes and four different LST lengths. Assembly issues will be addressed.

The CIAE Connection

F. Plasil
A target goal of 70% of market price of LST's has been set in order for CIAE to remain under consideration as a possible supplier of the required LST's. CIAE has agreed to meet this goal. However, there are still "risk" factors invovlved. ORNL has agreed to help CIAE to get started in prototype construction, and to monitor development and manufacturing capabilities in China. A visit is planned for late August. A status report on the CIAE connection will be presented.

MuID Simulation Studies

K. Read
The current status of muID simulation studies will be presented. Both offline and LVL-1 trigger performance will be discussed. Realistic panel dimensions, hodoscopic ambiguities, and a variety of LVL-1 algorithms are included. The tentative conclusions are that x-y hodoscopic readout with groups of eight wires ganged together is satisfactory for performance, J/psi detection, and UA1 background event rejection.

However, the beam gas events simulated by LSU present phenomenal multiplicities, especially when hodoscopic ambiguities are allowed. The generator model is currently in question. A rather efficient (for J/psi) LVL-1 trigger scheme which can reject most of even such beam gas events with hodoscopic ambiguities turned off is presented. This would necessitate reading out both ends of the wire using TDCs to improve the lateral position resolution to perhaps 50 cm along a 5 m LST. But as mentioned, revised beam gas models may present are far more tractable problem.

MuID Wire Readout and Gases

H. Kim
Longevity issues leads one to consider running the LSTs in proportional (not avalanche) mode. Drift time intervals per tube on the order of 65 ns are obtained. Note that there is a 20 ns interval due to the 5 m length of the LST if only one end is read out. By doubling and staggering the tubes, timing of the order of 65/2 + 20 = 52 nsec can be expected. In order to achieve such fast timing, CF4 gas (mixed with some hydrocarbon) will be required. Other issues involving the gas (gain, dynamic range of pulses) will be discussed.

A high voltage capacitor is needed for readout of LST wires. A simple schematic will be presented showing exactly how the resistors and the capacitor are arranged for wire readout. (One capacitor for every 8 wires.) This scheme also works for reading out both ends.

PHENIX FEE and LVL-1 Requirements

G. Young
Overview of PHENIX requirements for FEE and the LVL-1 trigger will be presented. (Some comments may be made concerning calibrations if time permits.)

MuID and MuTR FEE Status

K. Read
Proposed readout schemes for muID and muTR will be described. An update on work done since the last muon arm meeting will be given. A discussion will be led on how to proceed.

South Muon Magnet Design Issues

J. Bowers
Talk about the MMS structures, analysis/stability requirements, basic mechanical design concept and transport studies.