High Energy Dynode Detector for Ion Traps and ... - Cromlab
High Energy Dynode Detector for Ion Traps and ... - Cromlab
High Energy Dynode Detector for Ion Traps and ... - Cromlab
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<strong>High</strong> <strong>Energy</strong> <strong>Dynode</strong> <strong>Detector</strong><strong>for</strong> <strong>Ion</strong> <strong>Traps</strong> <strong>and</strong> QuadrupolesPreliminary Data sheet - Specifications may changePRODUCT DATA• <strong>High</strong> Detection Efficiency <strong>for</strong> <strong>Ion</strong>energies from 1 eV to 5 keV• Suitable <strong>for</strong> both <strong>Ion</strong> <strong>Traps</strong> <strong>and</strong>Quadrupoles• ± 10 kV HED Operation• Positive <strong>and</strong> Negative <strong>Ion</strong> Detection• Snap-in multiplier sectionThis unique high energy dynode (HED) multiplier isdesigned to be sensitive to a very wide range of ionenergies. While this is critical <strong>for</strong> ion trapoperation, it will also enhance the per<strong>for</strong>manceof quadrupole systems operating at high mass.There<strong>for</strong>e, it is ideal <strong>for</strong> LC-MS applications.As in all HED multipliers, a high voltage (± 10 kV)is applied to the conversion dynode (HED) toaccelerate the ions be<strong>for</strong>e their interaction withthe dynode surface. This enhances the electron(or secondary ion) yield from the dynode, which isparticularly important <strong>for</strong> high mass ions whichhave inherently low yield. For negative iondetection, positive high voltage is applied to theHED <strong>and</strong> the secondary positive ions generatedfrom the initial ion impact are focussed into theamplifying section. For positive ion detection,negative high voltage is applied to the HED <strong>and</strong>secondary electrons generated from the ionimpact are focussed into the amplifying section.Three different models are available; each featuringvery efficient ion optics. Refer to Table 1 <strong>for</strong>details of mechanical size <strong>and</strong> operational lifetimes.All ETP electron multipliers incorporate totallyair-stable "ACTIVE FILM" materials in adiscrete-dynode multiplier design to achieveexceptionally sensitive ion detection with longoperating life <strong>and</strong> excellent air stability.
<strong>High</strong> <strong>Energy</strong> <strong>Dynode</strong> <strong>Detector</strong> <strong>for</strong> <strong>Ion</strong> <strong>Traps</strong> <strong>and</strong> QuadrupolesPreliminary Data sheet - Specifications may change81.1Specifications DM286 DM283 DM285Sensitive area (mm)Maximum noise whenoperated at 2500 V.Relative life expectancy*Overall lengthMaximum recommended applied voltageRecommended HED voltageInternal resistanceNumber of dynodes10mm dia.< 1 pA100% @ 3.0kVmax81.1 mm3.0 kV± 10 kV23 Mohm15Table 1 - Technical Specifications* The operational life figures are based on simulation <strong>and</strong> are an indicator only.10 mm dia.< 1 pA150% @ 3.0kVmax92.8 mm3.0 kV± 10 kV28 Mohm1910 mm dia.< 1 pA300% @ 3.5 kV max.450% @ 4.0 kV max.110.3 mm4.0 kV± 10 kV37 Mohm25SGE International Pty. Ltd.Tel: +61 (0) 3 9837 4200Fax: +61 (0) 3 9874 5672Email: techsupport@etpsci.comSGE, Incorporated (USA)Toll Free: (800) 945 6154Fax: (512) 836 9159Email: usa@sge.comSGE Europe LtdTel: +44 (0) 1908 568844Fax: +44 (0) 1908 566790Email: uk@sge.comwww.etpsci.comA division of SGE©Copyright SGE International Pty. Ltd., 2004. All rights reserved. PD-0250-A Rev 00 07/04www.sge.com
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