1. Stations There are six stations of RPCs. They are 1-3 north, and 1-3 south. RPC3SRPC2S RPC1SRPC1N RPC2NRPC3N This document is available at http://www.phenix.bnl.gov/WWW/trigger/muonupgrade/nomenclature/numenclature.ppt Keller Andrews, June 26, 2008

2. Stations (cont.) Each station is composed of eight octants. On station two and three, each of the octants is divided into two half octants to make them easier to handle. This is done because of the Muon tracker chambers divided into octants. This document is available at http://www.phenix.bnl.gov/WWW/trigger/muonupgrade/nomenclature/numenclature.ppt Keller Andrews, June 26, 2008

3. Half-octants Each half octant is composed of separate modules. Station three is made up of three modules, named A-C. Station two is made up of four modules, named A-D. A A B B C DC Station 2Station 3 This document is available at http://www.phenix.bnl.gov/WWW/trigger/muonupgrade/nomenclature/numenclature.ppt Keller Andrews, June 26, 2008

4. Module Side Naming The outer radius side is the side farthest away from the beam pipe The inner radius side is the side closest to the beam pipe The half-octant side is the side that shares a perpendicular side with another half octant The octant side is the side that (if you put two half-octants together) would be the octant boundary. Outer Radius Side Inner Radius Side Octant Side Half-Octant Side This document is available at http://www.phenix.bnl.gov/WWW/trigger/muonupgrade/nomenclature/numenclature.ppt Keller Andrews, June 26, 2008

5. Modules Each module is composed of several parts. The aluminium casing, referred to as the module casing (easy to remember) ‏ Two gas gaps A set of readout strips Front End Electronics (FEE) consisting of: An Amplifier A Discriminator Inside of the module casing, the readout strip is placed between the two gas gaps with the readout electronics on the outside of the module. This document is available at http://www.phenix.bnl.gov/WWW/trigger/muonupgrade/nomenclature/numenclature.ppt Keller Andrews, June 26, 2008

6. Gas Gaps Each gas gap is composed of the following: Two parallel plates of Bakelite coated on one side by graphite (for conductivity) ‏ Polycarbonate spacers in between the plates to keep them apart a uniform distance Tubes for gas in and out on each corner (two in, two out) ‏ High voltage is connected to the outer surface of one Ground is connected to the outer surface of the other. This document is available at http://www.phenix.bnl.gov/WWW/trigger/muonupgrade/nomenclature/numenclature.ppt Keller Andrews, June 26, 2008

7. Readout Strips The readout strips (also called the signal plane are in between the two gas gaps Each strip is numbered according to it’s corresponding strip in station one The strip in the center is completely radial and is numbered 16 on the bottom 48 on the top You then place 15 imaginary strips on each side of the center strip This leaves some strips off on the sides of the module. This is called dead space. For example: the signal plane for Prototype 4,Module A starts with strip 8 and ends on 25 on the bottom. 816 48 25 This document is available at http://www.phenix.bnl.gov/WWW/trigger/muonupgrade/nomenclature/numenclature.ppt Keller Andrews, June 26, 2008

8. Octant/Half-Octant Naming Scheme The half-octants are named in order from one t0 eight One is the top octant, two is the clockwise (when viewed from the IR), adjacent octant, three is the next clockwise, adjacent octant, and so on. Each half octant is named according to it’s octant, and which side (clockwise or counterclockwise) it is on 1 2 3 4 5 8 7 6 1co1cl 2co 2cl 3co 3cl 4co 4cl This document is available at http://www.phenix.bnl.gov/WWW/trigger/muonupgrade/nomenclature/numenclature.ppt Keller Andrews, June 26, 2008