1 / 13

ISCOOL Test 46K: Cooler Performance Summary

Learn about ISCOOL's latest test results on cooler performance, including emittance measurements, ion trapping, transmissions, and more. Detailed analysis and future directions discussed.

stephanieallen
Download Presentation

ISCOOL Test 46K: Cooler Performance Summary

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. On-line tests RFQ coolerISCOOLA quick summary P. Delahaye, H. Frånberg, I. Podadera ISCOOL, COLLAPS, ISOLDE collaboration

  2. Where at ISOLDE

  3. Installation in pictures

  4. Principle • Three elements: • RF quadrupolar field • Radial confinement • DC potentials • Extracting ion in bunches or in continuos mode • Buffer gas •  Ion motion cooling

  5. Emittance measurements ~35p·mm·mrad 95% emittance ~2.2p·mm·mrad 95% emittance

  6. Transmissions • Potentials along the axis • Transmissions in DC • 23Na: 50% • 39K: >75% • 85Rb: >75% 50V (30V enough) 5-2V/cm 80eV TRAPPING ~1E-2 mbar 4He 10-2mbar l/s INJECTION EXTRACTION Better than the off-line tests! Smaller emittances from ISOLDE surface ion sources than from the ion source used during off-line tests.

  7. Cooling time • TOF < 1ms from the entrance to the exit of the RFQ • 1 passage is enough to get a cold beam • as measured off-line, and other labs as predicted by simulations for other systems

  8. 50V (30V enough) 5-2V/cm 80eV TRAPPING ~1E-2 mbar 4He 10-2mbar l/s INJECTION EXTRACTION Bunching mode 30keV

  9. Space charge limits • Up to 108/s!! As measured with FC (data under analysis with MCP) 39K 85Rb

  10. Bunch width • Depends on the space charge and cooling time Collection / cooling time

  11. Preliminary results • Data from 26Na needs to be analyzed • Losses due to trapping time (analysis in progress) • Chemistry, noble gases, reactive elements • More data needed for more masses (light ions) • CaO target + plasma ion source should provide some answers

  12. ISCOOL TEST 46K Beam 1E5 ions/s after the cooler. Collection time 20 minutes, with 300ms bunching and a 12us gate and 2mW of laser power. Singles (continuous counting) Bunched:12us gated spectra Background suppression factor~1E4

  13. AB-OP-PSB-iso team: Pascal, Erwin, Magnus, Emiliano and Tim. AB/ATB AB/CO AB/PO AB/VAC SC/RP ISOLDE collaboration COLLAPS collaboration ISCOOL collaboration Thanks to:

More Related