TRIUMF Particle Accelerator and Isotope Production

• Located at University of British Columbia, Vancouver
• Underground pneumatic tube system called "Rabbit Line" - 2.5 kilometers long
• Transports radioactive materials from particle accelerator to hospital
• Only surface indicators: manholes and ground studs marking path
• Most UBC students/staff unaware of system operating beneath them
• Capsules travel at up to 100 km/h several times daily

GMP Lab Operations at TRIUMF

• Uses cyclotrons to create medical isotopes for imaging and therapy
• Process: inject H- (negative hydrogen charges) → spin and accelerate → extract to proton → hit target with proton beam → produces radioactive isotopes
• Chemists combine isotopes with injectable liquid (mostly saline)
• Focus on short-lived isotopes, particularly carbon-11
  • Carbon-11 half-life: only 20 minutes
  • Requires very fast processing and transport
• Production quantities: nanogram range for long-lived isotopes, even smaller for short-lived

Rabbit Line Transport System

• 100 psi air pressure accelerates capsules to 100 km/h top speed
• Journey time: just over 2 minutes vs 10-15 minutes by road
• More reliable than road transport, no traffic stops
• Safety: soil provides shielding, doses safe for human injection
• Stopping mechanism: vent 10 meters from end releases pressure, compressed air acts as buffer

Hospital Reception and Medical Applications

• Capsules arrive at University Hospital
• Used for radiopharmaceuticals in medical research
• Gamma ray detection for brain imaging without invasive procedures
• Research applications:
  • Parkinson's disease early detection (before clinical symptoms appear)
  • Psychiatry, mood disorders, dementia, addiction studies
  • Neurochemical placebo effect discovery (neurotransmitter release from expectation alone)
• No pharmacological effects on body systems being studied

System Logistics

• Capsule return: manual pickup/delivery by vehicle ("old-school")
• Origin of "Rabbit Line" name: unknown to current staff
• Similar systems exist globally at hospitals with particle accelerators
• Most use less dramatic transport methods than Vancouver's system