Activation of sweeping magnets in Tevatron II standardized target piles

Technical Report · Tue Mar 01 00:00:00 EST 1983

DOI:https://doi.org/10.2172/6307081· OSTI ID:6307081

Cossairt, J D

As designs of the primary targeting schemes for the new Tevatron II slow spill beams progress, it is becoming clear that a standardized form for these schemes is emerging. The general form consists of a production target (usually about 30 cm of beryllium having a diameter from 0.64 to 1.27 cm) followed by from one to three of the new Tevatron II H frame magnets recently developed by D. Eartly. These magnets sweep the unused primary proton beam onto a massive steel beam dump containing a core of material capable of dispersing the energy of the beam along with a hole for transmitting the secondary beam desired at experimental targets. Typical primary proton intensities at such production targets are planned to be in the range of 3 x 10/sup 12/ to 5 x 10/sup 12/ protons per spill. If one assumes such operation during a run of 4000 hours per year, 60 spills per hour, the integrated beam is seen to be approximately 1 x 10/sup 18/ per year targetted at a rate of 7/0 x 10/sup 10/ protons/sec during the run. It is clear, from experience, that such beam intensities require that the water used to cool the beam dump must be in a closed loop system both to protect personnel during operations from the external radiation exposure rate due to short lived radionuclides (e.g., /sup 11/C and /sup 7/Be) and to protect against release of significant activities of tritium into surface waters. It is not certain that a closed loop system is required for the sweeping magnets. This TM reports on a calculation designed to evaluate this potential problem, the expected dose rates external to such magnets, and the total activity which will be contained in them and the target.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 6307081
• Report Number(s): FNAL-TM-1168; ON: DE85004267
• Resource Relation: Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
TEVATRON
BEAM DUMPS
BEAM BENDING MAGNETS
COOLING SYSTEMS
FERMILAB ACCELERATOR
PROTON BEAMS
RADIATION PROTECTION
RADIOACTIVATION
ACCELERATORS
BEAMS
CYCLIC ACCELERATORS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ENERGY SYSTEMS
EQUIPMENT
MAGNETS
NUCLEON BEAMS
PARTICLE BEAMS
SYNCHROTRONS
430303* - Particle Accelerators- Experimental Facilities & Equipment