Sector Pair Overview


Sector Pair Diagram Main Drive Line EMHP power supply Variable Voltage Substation Subbooster System Subbooster System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Klystron System Reference Line Phase Monitor Reference Line Phase Monitor

Notes:

This diagram shows an overview of a given sector pair in the linac, consisting of an odd sector followed by an even sector, in the sense that the "downstream" or eastward direction is to the right.  This layout has been chosen because two of the important electrical components of the linac RF system serve two sectors:  a VVS located in each even sector serves that sector and the odd sector preceding it;  and an EMHP power supply for the klystron focusing solenoidslocated in each odd sector supplies all klystrons in that sector and the subsequent even sector.  Note that this configuration is opposite to what is considered a "sector pair" in the PPS system, which divides the linac into pairs of sectors consisting of an even sector followed by an odd sector.

This diagram may looks complicated at first, but once understood, it is in fact the simplest of the diagrams in this site.  It illustrates five basic points:

  1. The main drive line (MDL), shown at the top, runs the length of the linac and carries a 476 MHz timing signal that is picked off and distributed to the subbooster system in each sector.
  2. One subbooster system in each sector produces a 2856 MHz RF signal on the sub-drive line (SDL), which feeds the eight klystrons in that sector.
  3. Each sector's subbooster system also outputs a 2856 MHz signal on a phase reference line (PRL). A reference phase monitor in each sector compares the phase of the PRL signal from that sector's subbooster with that of the sector before it.
  4. An EMHP power supply located in each odd sector provides power to the eight klystron stations in that sector, as well as the eight klystron systems in the subsequent even sector.
  5. A VVS (electrical substation) provides power to each of the eight klystron stations in that sector, as well as the eight klystron stations in the odd sector before it.