Imaging low-energy positron beams in real-time with unprecedented resolution
Particle beams focused to micrometer-sized spots play a crucial role in forefront research using low-energy positrons. Their expedient and wide application, however, requires highly-resolved, fast beam diagnostics. We have developed two different methods to modify a commercial imaging sensor to make...
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| creator | Berghold, Michael Burwitz, Vassily Vadimovitch Mathes, Lucian Hugenschmidt, Christoph Pascal Guatieri, Francesco |
| description | Particle beams focused to micrometer-sized spots play a crucial role in
forefront research using low-energy positrons. Their expedient and wide
application, however, requires highly-resolved, fast beam diagnostics. We have
developed two different methods to modify a commercial imaging sensor to make
it sensitive to low-energy positrons. The first method consists in removing the
micro-lens array and Bayer filter from the sensor surface and depositing a
phosphor layer in their place. This procedure results in a detector capable of
imaging positron beams with energies down to a few tens of eV, or an intensity
as low as 35 particles/s/mm2 when the beam energy exceeds 10keV. The second
approach omits the phosphor deposition; with the resulting device we succeeded
in detecting single positrons with energies upwards of 6 keV and efficiency up
to 93%. The achieved spatial resolution of 0.97 micrometers is unprecedented
for real-time positron detectors. |
| doi_str_mv | 10.48550/arxiv.2306.03432 |
| format | Article |
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forefront research using low-energy positrons. Their expedient and wide
application, however, requires highly-resolved, fast beam diagnostics. We have
developed two different methods to modify a commercial imaging sensor to make
it sensitive to low-energy positrons. The first method consists in removing the
micro-lens array and Bayer filter from the sensor surface and depositing a
phosphor layer in their place. This procedure results in a detector capable of
imaging positron beams with energies down to a few tens of eV, or an intensity
as low as 35 particles/s/mm2 when the beam energy exceeds 10keV. The second
approach omits the phosphor deposition; with the resulting device we succeeded
in detecting single positrons with energies upwards of 6 keV and efficiency up
to 93%. The achieved spatial resolution of 0.97 micrometers is unprecedented
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forefront research using low-energy positrons. Their expedient and wide
application, however, requires highly-resolved, fast beam diagnostics. We have
developed two different methods to modify a commercial imaging sensor to make
it sensitive to low-energy positrons. The first method consists in removing the
micro-lens array and Bayer filter from the sensor surface and depositing a
phosphor layer in their place. This procedure results in a detector capable of
imaging positron beams with energies down to a few tens of eV, or an intensity
as low as 35 particles/s/mm2 when the beam energy exceeds 10keV. The second
approach omits the phosphor deposition; with the resulting device we succeeded
in detecting single positrons with energies upwards of 6 keV and efficiency up
to 93%. The achieved spatial resolution of 0.97 micrometers is unprecedented
for real-time positron detectors.</description><subject>Physics - Instrumentation and Detectors</subject><subject>Physics - Materials Science</subject><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>GOX</sourceid><recordid>eNotz71ugzAUhmEvHaq0F9ApvgGofWwwjFHUn0hIXbKjY3xMLIFBhjTN3bdNO33DK33Sw9iTFLmuikI8Y_oKnzkoUeZCaQX3rDmM2IfY82G6ZBQp9Vc-T0tY0xS5JRwXHiJPhEO2hpH4Jawnfo5zoo4cxZXcT1ym4byGKT6wO4_DQo__u2HH15fj_j1rPt4O-12TYWkgs7VDCQKNtFh2tYKaQFe-lqUsnUaLBThvofNgBGjnvDEVuc5I6HSN3qkN2_7d3jjtnMKI6dr-stobS30DjRNJkg</recordid><startdate>20230606</startdate><enddate>20230606</enddate><creator>Berghold, Michael</creator><creator>Burwitz, Vassily Vadimovitch</creator><creator>Mathes, Lucian</creator><creator>Hugenschmidt, Christoph Pascal</creator><creator>Guatieri, Francesco</creator><scope>GOX</scope></search><sort><creationdate>20230606</creationdate><title>Imaging low-energy positron beams in real-time with unprecedented resolution</title><author>Berghold, Michael ; Burwitz, Vassily Vadimovitch ; Mathes, Lucian ; Hugenschmidt, Christoph Pascal ; Guatieri, Francesco</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a672-b9da120a71ba6c9329e248f91616d4aba52dfb2cf27024ddf778edc712c49afd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Physics - Instrumentation and Detectors</topic><topic>Physics - Materials Science</topic><toplevel>online_resources</toplevel><creatorcontrib>Berghold, Michael</creatorcontrib><creatorcontrib>Burwitz, Vassily Vadimovitch</creatorcontrib><creatorcontrib>Mathes, Lucian</creatorcontrib><creatorcontrib>Hugenschmidt, Christoph Pascal</creatorcontrib><creatorcontrib>Guatieri, Francesco</creatorcontrib><collection>arXiv.org</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Berghold, Michael</au><au>Burwitz, Vassily Vadimovitch</au><au>Mathes, Lucian</au><au>Hugenschmidt, Christoph Pascal</au><au>Guatieri, Francesco</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Imaging low-energy positron beams in real-time with unprecedented resolution</atitle><date>2023-06-06</date><risdate>2023</risdate><abstract>Particle beams focused to micrometer-sized spots play a crucial role in
forefront research using low-energy positrons. Their expedient and wide
application, however, requires highly-resolved, fast beam diagnostics. We have
developed two different methods to modify a commercial imaging sensor to make
it sensitive to low-energy positrons. The first method consists in removing the
micro-lens array and Bayer filter from the sensor surface and depositing a
phosphor layer in their place. This procedure results in a detector capable of
imaging positron beams with energies down to a few tens of eV, or an intensity
as low as 35 particles/s/mm2 when the beam energy exceeds 10keV. The second
approach omits the phosphor deposition; with the resulting device we succeeded
in detecting single positrons with energies upwards of 6 keV and efficiency up
to 93%. The achieved spatial resolution of 0.97 micrometers is unprecedented
for real-time positron detectors.</abstract><doi>10.48550/arxiv.2306.03432</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Physics - Instrumentation and Detectors Physics - Materials Science |
| title | Imaging low-energy positron beams in real-time with unprecedented resolution |
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