SLAC Aerial View SLAC Timing System Specifications Blue Book: (~1968) PEP – II: (~1998) - Resolution: 50 nSec - Resolution: 2.1 nSec - Jitter: 15 nSec - Jitter:
Download ReportTranscript SLAC Aerial View SLAC Timing System Specifications Blue Book: (~1968) PEP – II: (~1998) - Resolution: 50 nSec - Resolution: 2.1 nSec - Jitter: 15 nSec - Jitter:
SLAC Aerial View SLAC Timing System Specifications Blue Book: (~1968) PEP – II: (~1998) - Resolution: 50 nSec - Resolution: 2.1 nSec - Jitter: 15 nSec - Jitter: 20 pSec - Main Trigger Line - NIM Level Waveform: Waveform: + / - 400 Volts 0 to –0.7 V into 50 Ohms Historical MCC Timing Units Machine Cycle 1 / 360 Second = 2.78 mSec Timing System Enclosure Waveforms: 476 MHz with FIDUCIALS LINAC PEP - 2 Waveforms: 119 MHz and NIM Pulse FIDO Output PDU Output SLAC Landscape Trigger Generation, simplified Sector 0 Trigger Generation, oversimplified Trigger Generation, simplified Area Three, Rack One Area One, Rack One CAMAC Trigger Distribution: Sector 0 and 1 476 Mhz FROM MDL COUPLER AMPLIFIER AND SPLITTER 476 Mhz TO DAMPING RING SECTOR 0 FEEDBACK FIDO 119 DISTRIBUTION 119 Mhz to CID VAULT FIDO 119 DISTRIBUTION 119 Mhz to SECTORS 0 and 1 Klystron Gallery Trigger Distribution: Damping Rings 476 Mhz from S0 Alcove FIDO 476 Mhz 119 DISTRIBUTION 119 Mhz to South Ring FIDO 119 DISTRIBUTION 119 Mhz to North Ring LINAC Rack, Front LINAC Rack, Rear MDL Coupled Output LINAC Timing Sector TEN MDL Coupler 476 Mhz 476 Mhz Splitter SECTOR 10 SUBBOOSTER 476 Mhz FIDO 119 Mhz PDU PDU PDU Li09 Cr 4 Li10 Cr 2 Li10 Cr 3 LINAC Timing Diagnostic Fiber Optic Xmtr Fiber Optic Link Bldg 407 TOP of S-30 SUB-Booster FIBER OPTIC TRANSMITTER FIBER OPTIC RECEIVER 476 MHz Bldg 407 Bldg 062 NLCTA 476 MHz AMPLIFIER and SPLITTER TERM NLCTA Trigger Distribution NLCTA Triggers Bldg 407 Bldg 407 FIBER OPTIC RECEIVER AMPLIFIER and SPLITTER 476 Mhz 476 Mhz Bldg 062 476 Mhz Distribution 476 Mhz TERM RF REFERENCE SYSTEM FIDO PDU 119 Mhz Distribution PDU PDU NLCTA Beam Line PEP – 2 Timing Generation MAIN DRIVE LINE PEP - 2 CONTROL LINE DIST CHASSIS PEP 2 FIDUCIAL GENERATOR 125-843 PHASE LOCK AND INJECTION FIDUCIAL DETECTOR PEP - 2 MASTER OSCILLATOR 476 Mhz POWER AND VOLTAGE MONITORS PEP – 2 Timing Equipment PEP – 2 Timing Distribution TPLD REGION 12 TPLD REGION 2 TPLD REGION 10 PEP - 2 MASTER OSCILLATOR TPLD REGION 8 PEP - 2 FIDUCIAL GENERATOR TPLD REGION 6 TPLD REGION 4 PEP – 2 Klystrons SLC Timing Distribution S30 MAIN DRIVE LINE SECTOR 30 MDL DISTRIBUTION 476 Mhz 476 Mhz FIDO 119 Mhz 119 DIST 119 Mhz 119 DIST 119 DIST 119 DIST 119 DIST 119 DIST 119 DIST PDU Bldg 725 Spltr Bldg 669 Bldg 136 Bldg 750 Bldg 757 119 DIST Bldg 751 119 Mhz PDU Bldg 136 Trigger Distribution 119 MHz Propagation in SLC Sector 30 “Source” Final Focus Some Timing Modules • • • • • FIDO PDU (SLC) PDU (PEP – 2) Simple Timing Buffer VDU • 476 MHz Distribution • 119 MHz Distribution • PEP – 2 Timing Phase Lock and Distribution FIDO Unit FIDO B. D. 2.5 mSec LOCKOUT 476 Mhz Splitter BANDPASS FILTER RESET INHIBIT FIDUCIAL DETECTOR 8 nSec ONE-SHOT DIVIDE By 4 DRIVER PDU OUTPUTS DIVIDE By 4 DRIVER PSU OUTPUTS PDU – SLC Style 119 Mhz Counter Detector Glue Logic RE-USE To CAMAC Upper Timing Backplane Register Sixteen channels per PDU; One channel shown Differential ECL Output From CAMAC LINAC Timed Crate PDU, Backplane, and STB 119 MHz STB PDU CAMAC Upper Timing BACKPLANE Front Panel 16 Channels LEMO Connectors NIM Level Outputs 16 Channels Delay Output Generator Voltage Monitor Interval Timer Designer’s original module names. Refer to Proverbs 26:11, KJV PEP – 2 Timed Crate Vernier Delay Unit 476 Distribution Unit 476 MHz Distribution B.D. 476 Mhz Variable Attenuator AMP Splitter AMP Splitter 476 Mhz To FIDOs Splitter 476 Mhz To FIDOs FIDOs and 119 Distribution 119 MHz Distribution B.D. Variable Attenuator 119 Mhz AMP Splitter 119 Mhz To PDUs Splitter Variable Attenuator AMP 119 Mhz To Next Distribution Unit TPLD Chassis Front Panel Timing Phase Lock Distribution B.D. Graphic by E.L.Cisneros TPLD SCP Diagnostics 1 TPLD SCP Diagnostics 2 Some Triggered Devices • Kickers • Single Beam Dumper Logic • Beam Position Monitors • Toroid Charge Monitors • Trigger Gate and Synchronizer Damping Ring Kicker Triggers Single Beam Dumper Logic Module Toroid Charge Monitor B.D. Ch 11 Trig Ch 12 Enable TOROID on Beam Line Rocks Some Common Timing Problems • Jitter • FIDO – related Failures • Connections • Bucket Jump • Undocumented modifications 280