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Senior Scientists
![John Appel](https://sites.krieger.jhu.edu/class/files/2018/06/Both-John-Appel-e1528835694941-225x300.jpg)
John Appel
Contact Information
- jappel3@jhu.edu
- Johns Hopkins University
Research Interests: Associate Research Scientist — Development, integration and deployment of CLASS detector arrays
![Charles Bennett](https://sites.krieger.jhu.edu/class/files/2018/07/bennett2-200x300.jpg)
Charles Bennett
Contact Information
- cbennett@jhu.edu
- Johns Hopkins University
Research Interests: Faculty — Co-Principal Investigator
![Ricardo Bustos](https://sites.krieger.jhu.edu/class/files/2018/06/Ricardo_Bustos-Ricardo-Bustos-300x300.jpg)
Ricardo Bustos
Contact Information
- rbustos@ucsc.cl
- Universidad Católica de la Santísima Concepción
Research Interests: Faculty — CLASS project operations and engineering support
![David Chuss](https://sites.krieger.jhu.edu/class/files/2018/07/chuss_headshot-240x300.jpg)
David Chuss
Contact Information
- david.chuss@villanova.edu
- Villanova University
Research Interests: Faculty — Modulator and detector development; Constructing the large grids for the modulators; Developing free-space cryogenic calibrators for validating the detectors
![Rahul Datta](https://sites.krieger.jhu.edu/class/files/2019/01/pic_rd-225x300.jpg)
Rahul Datta
Contact Information
- rahuld@uchicago.edu
- University of Chicago and Fermilab
Research Interests: Research Scientist
![Jullianna Denes Couto](https://sites.krieger.jhu.edu/class/files/2018/07/Screen-Shot-2018-07-05-at-12.18.46-PM-282x300.png)
Jullianna Denes Couto
Contact Information
- jdenesc1@jhu.edu
- Johns Hopkins University
Research Interests: Field operations
![Kevin Denis](https://sites.krieger.jhu.edu/class/files/2018/07/K_Denis_3.5x5.jpg)
Kevin Denis
Contact Information
- kevin.l.denis@nasa.gov
- Goddard Space Flight Center
Research Interests: Tenured Scientist — Detector fabrication lead
![Rolando Dünner Planella](https://sites.krieger.jhu.edu/class/files/2018/07/IMG_2880.jpg)
Rolando Dünner Planella
Contact Information
- rdunner@astro.puc.cl
- Pontificia Universidad Católica de Chile
Research Interests: Faculty
![Joseph Eimer](https://sites.krieger.jhu.edu/class/files/2018/07/J_Eimer-219x300.jpg)
Joseph Eimer
Contact Information
- jeimer1@jhu.edu
- Johns Hopkins University
Research Interests: Associate Research Scientist — Instrumentation and analysis
![Tom Essinger-Hileman](https://sites.krieger.jhu.edu/class/files/2018/07/Publicity-photo-cropped-Tom-Essinger-Hileman-257x300.jpg)
Tom Essinger-Hileman
Contact Information
- thomas.m.essinger-hileman@nasa.gov
- Goddard Space Flight Center
Research Interests: Tenured Scientist — Detector and focal plane array development; Polarization calibrator design; Receiver design and construction; Filter development
![Mark Halpern](https://sites.krieger.jhu.edu/class/files/2018/07/halpern-225x300.jpg)
Mark Halpern
Contact Information
- halpern@physics.ubc.ca
- University of British Columbia
Research Interests: Faculty — Multichannel electronics
![Katie Harrington](https://sites.krieger.jhu.edu/class/files/2018/06/Harrington_Kathleen-Katie-Harrington-279x300.jpg)
Katie Harrington
Contact Information
- kharrington@anl.gov
- Argonne National Laboratory
Research Interests: Assistant Physicist - Designed and built the first 2 VPMs; Developed machining procedures for the cryogenic plastic optics; Analysis work relating to the VPM and demodulation
![Gene Hilton](https://sites.krieger.jhu.edu/class/files/2018/07/thumb179.jpg)
Gene Hilton
Contact Information
- gene.hilton@nist.gov
- National Institute of Standards and Technology
Research Interests: Tenured Scientist — SQUID multiplexing hardware fabrication
![Johannes (Hannes) Hubmayr](https://sites.krieger.jhu.edu/class/files/2018/06/hubmayrHS-Johannes-Hubmayr-284x300.jpg)
Johannes (Hannes) Hubmayr
Contact Information
- hubmayr@nist.gov
- National Institute of Standards and Technology
Research Interests: Faculty — Providing SQUID multiplexing hardware
![Tobias Marriage](https://sites.krieger.jhu.edu/class/files/2018/06/Photo-May-29-10-14-33-AM-280x300.jpg)
Tobias Marriage
Contact Information
- marriage@jhu.edu
- Johns Hopkins University
Research Interests: Faculty — Co-Principal Investigator
![Jeffrey McMahon](https://sites.krieger.jhu.edu/class/files/2018/07/image.1530557085208-200x300.jpg)
Jeffrey McMahon
Contact Information
- jeffmcm@umich.edu
- University of Chicago
Research Interests: Faculty — Silicon lenses
![Nathan Miller](https://sites.krieger.jhu.edu/class/files/2018/07/nathan-miller-255x300.png)
Nathan Miller
Contact Information
- nathan.j.miller@nasa.gov
- Johns Hopkins University
Research Interests: Research Scientist — Analysis
![Gonzalo Palma](https://sites.krieger.jhu.edu/class/files/2018/07/gonzalo-palma.jpg)
Gonzalo Palma
Contact Information
- gpalmaquilod@ing.uchile.cl
- Universidad de Chile
Research Interests: Faculty — Theory
![Lucas Parker](https://sites.krieger.jhu.edu/class/files/2018/07/Lucas-213x300.png)
Lucas Parker
Contact Information
- lparke28@jhu.edu
- Los Alamos National Laboratory
Research Interests: Cryogenics; Data analysis
![Rodrigo Reeves](https://sites.krieger.jhu.edu/class/files/2018/07/rr-1.jpg)
Rodrigo Reeves
Contact Information
- rreeves@astro-udec.cl
- Universidad de Concepción
Research Interests: Faculty — Project operations and engineering support
![Carl Reintsema](https://sites.krieger.jhu.edu/class/files/2018/07/DSCN5821-300x300.jpg)
Carl Reintsema
Contact Information
- carl.reintsema@nist.gov
- National Institute of Standards and Technology
Research Interests: Tenured Scientist — SQUID multiplexing hardware
![Karwan Rostem](https://sites.krieger.jhu.edu/class/files/2018/07/Rostem_Karwan-250x300.jpg)
Karwan Rostem
Contact Information
- karwan.rostem@nasa.gov
- University of Maryland, Baltimore County
Research Interests: Research Scientist — Detector design and testing
Janet Weiland
Contact Information
- jweilan2@jhu.edu
- Johns Hopkins University
Research Interests: Research Scientist — Analysis
![Edward Wollack](https://sites.krieger.jhu.edu/class/files/2018/07/Wollack2005IEEE_portrait_990495b-color-207x300.jpg)
Edward Wollack
Contact Information
- edward.j.wollack@nasa.gov
- Goddard Space Flight Center
Research Interests: Tenured Scientist — Detector design and testing lead
![Lingzhen Zeng](https://sites.krieger.jhu.edu/class/files/2018/06/Both-Lingzhen-Zeng-300x300.jpg)
Lingzhen Zeng
Contact Information
- lingzhen@cfa.harvard.edu
- Harvard-Smithsonian Center for Astrophysics
Research Interests: Research Scientist — Smooth-walled horn design
Engineering and Scientific Staff
![Aamir Ali](https://sites.krieger.jhu.edu/class/files/2018/07/AliEssinger-HilemanMarriage.jpg)
Aamir Ali
Contact Information
- aali18@jhu.edu
- John Templeton Foundation
Research Interests: Cosmology
![Mandana Amiri](https://sites.krieger.jhu.edu/class/files/2018/07/amiri_mandana.jpg)
Mandana Amiri
Contact Information
- mandana@physics.ubc.ca
- University of British Columbia
Research Interests: Research Scientist — Multichannel electronics
![Deniz Augusto Nunes Valle](https://sites.krieger.jhu.edu/class/files/2018/07/deniz-243x300.png)
Deniz Augusto Nunes Valle
Contact Information
- denizaugusto@yahoo.com.br
- Sociedad Radiosky Asesorias de Ingenieria
Research Interests: Field Engineer
![Michael Brewer](https://sites.krieger.jhu.edu/class/files/2018/07/Screen-Shot-2018-07-06-at-4.20.41-PM-272x300.png)
Michael Brewer
Contact Information
- mkbrewer@jhu.edu
- Johns Hopkins University
Research Interests: Engineer — Telescope software and pointing
Meng-ping Chang
Contact Information
- meng-ping.chang@nasa.gov
- Goddard Space Flight Center
Research Interests: Engineer — Detector fabrication
![Pedro Fluxá](https://sites.krieger.jhu.edu/class/files/2018/07/Screen-Shot-2018-07-06-at-11.27.02-AM-266x300.png)
Pedro Fluxá
Contact Information
- pafluxa@uc.cl
- European Southern Observatory
Research Interests: Cryogenics; Field work; Analysis
Ron Hu
Contact Information
- Goddard Space Flight Center
Research Interests: Engineer — Detector fabrication
![John Karakla](https://sites.krieger.jhu.edu/class/files/2018/07/2015-12-04_161644790_19C16_iOS-245x300.jpg)
John Karakla
Contact Information
- jpjk@jhu.edu
- Johns Hopkins University
Research Interests: Engineer — Telescope mount design and fabrication; Site construction and logistics
![Carolina Núñez](https://sites.krieger.jhu.edu/class/files/2018/06/Nunez-Carolina-Nunez-225x300.jpeg)
Carolina Núñez
Contact Information
- Northrop Grumman
![Keisuke Osumi](https://sites.krieger.jhu.edu/class/files/2018/10/Keisuke.jpg)
Keisuke Osumi
Contact Information
- MITRE
![James Rittner](https://sites.krieger.jhu.edu/class/files/2021/06/JRittner-258x300.png)
James Rittner
Contact Information
- Baltimore City Public Schools
Research Interests: Visiting Scholar
![Jeremy Smith](https://sites.krieger.jhu.edu/class/files/2020/06/IMG_5646-225x300.jpg)
Jeremy Smith
Contact Information
- jsmith10@bcps.org
- Baltimore County Public Schools
Research Interests: Visiting Scholar
![Zhilei Xu](https://sites.krieger.jhu.edu/class/files/2018/07/Zhilei_2018-225x300.jpg)
Zhilei Xu
Contact Information
- astro.zlxu@gmail.com
- Neo Ivy Capital Management
Research Interests: Postdoctoral Scholar — Instrument development (cold optics and the mount system); Data analysis effort to calibrate the instrument
Postdoctoral Researchers
![Sarah Marie Bruno](https://sites.krieger.jhu.edu/class/files/2022/01/image-3-226x300.png)
Sarah Marie Bruno
Postdoctoral Fellow
Contact Information
- sbruno3@jhu.edu
- Johns Hopkins University
Research Interests: Experimental CMB cosmology
![Joseph Cleary](https://sites.krieger.jhu.edu/class/files/2018/06/jcleary_pic-Joseph-Cleary-227x300.jpg)
Joseph Cleary
Contact Information
- jcleary3@jhu.edu
- Fermilab, University of Chicago
Research Interests: Assembling and characterizing the W2 and HF VPMs, as well as understanding their performance in the field; Manufacturing the AR-coated vacuum windows
![Sumit Dahal](https://sites.krieger.jhu.edu/class/files/2018/06/Sumit1-235x300.jpg)
Sumit Dahal
Contact Information
- sumit.dahal@nasa.gov
- Goddard Space Flight Center
Research Interests: Postdoctoral Researcher — Detector characterization and focal plane assembly; Manufacturing lenses and filters
![Kyle Helson](https://sites.krieger.jhu.edu/class/files/2018/07/DSCF0426-copy-254x300.jpg)
Kyle Helson
Contact Information
- kyle.helson@nasa.gov
- Goddard Space Flight Center
Research Interests: Postdoctoral Fellow — Detector testing
![Jeffrey Iuliano](https://sites.krieger.jhu.edu/class/files/2018/07/11.-20180227_W1RxClosed-241x300.jpg)
Jeffrey Iuliano
Contact Information
- iulianoj@sas.upenn.edu
- University of Pennsylvania
Research Interests: Instrumentation
![Matthew Petroff](https://sites.krieger.jhu.edu/class/files/2018/07/matthew-petroff-1280x853-236x300.jpg)
Matthew Petroff
Contact Information
- matthew.petroff@cfa.harvard.edu
- Harvard University
Research Interests: Postdoctoral Researcher
![Duncan Watts](https://sites.krieger.jhu.edu/class/files/2018/07/0A3F4878-F871-4D16-B8D1-277C3AEAA449-214x300.jpeg)
Duncan Watts
Contact Information
- duncan.watts@astro.uio.no
- University of Oslo
Research Interests: Postdoctoral Researcher — Data analysis
Graduate Students
![Carol Chan](https://sites.krieger.jhu.edu/class/files/2022/08/210503-221x300.jpg)
Carol Chan
Contact Information
- ychan19@jhu.edu
- Johns Hopkins University
Research Interests: Instrumentation
![Yunyang Li](https://sites.krieger.jhu.edu/class/files/2018/10/portrait-200x300.jpeg)
Yunyang Li
Contact Information
- yunyangl@jhu.edu
- Johns Hopkins University
Research Interests: Graduate
![Carolina Morales](https://sites.krieger.jhu.edu/class/files/2021/06/Carolina_Morales-300x300.jpg)
Carolina Morales
Contact Information
- cmoral15@jhu.edu
- Johns Hopkins University
Research Interests: Instrumentation and Analysis
![Caleigh Ryan](https://sites.krieger.jhu.edu/class/files/2023/09/image-8-225x300.png)
![Rui Shi](https://sites.krieger.jhu.edu/class/files/2021/08/RuiShi-236x300.png)
Rui Shi
Contact Information
- rshi9@jhu.edu
- Johns Hopkins University
Research Interests: Graduate Student
![Koji Shukawa](https://sites.krieger.jhu.edu/class/files/2023/09/image-7-225x300.png)
Koji Shukawa
Contact Information
- kshukaw1@jh.edu
- Johns Hopkins University
Research Interests: Instrumentation and Data Analysis
Undergraduate Students
Naina Gupta
Contact Information
- ngupta44@jhu.edu
- Johns Hopkins University
Research Interests: Instrumentation
![Amelie Wang](https://sites.krieger.jhu.edu/class/files/2023/09/Wang-268x300.png)
Amelie Wang
Contact Information
- lwang194@jh.edu
- Johns Hopkins University
Research Interests: Laboratory Measurements