SKCCC Experimental Irradiator Core

Overview of Services


  • Maintains and operates sources of ionizing radiation for use by Cancer Center Members in their experimental studies
  • Established in 1986
  • Services include training in the operation of the sources, advice to users on the design of experiments using radiation, scheduling use of the sources, operating the sources when necessary, dosimetry for new experimental setups, and maintenance and repair of the resources.



John Wong, PhD., Resource Director



Marikki Laiho, MD, PhD Co-Director



Elwood Armour, Ph.D., Physicist



Esteban Velarde, Core Manager


Location and hours of operation

Hours Location

Monday- Friday

9AM - 9 PM

Excluding Holidays

Location 1:

1550 Orleans street

Location 2:

1650 Orleans Street

Baltimore, MD

Links and Resources


All unescorted irradiator users will follow the U.S Nuclear Regulatory Commission and Maryland Department of the Environment regulations for use of the experimental irradiators in the Kimmel Cancer Center.

Those individuals requiring immediate use of the irradiators will need to work with someone that already has approved access (escort). It is mandatory that this approved person accompany you during your use of the irradiator. You may work with an approved person while you are applying for your own access.

If your use of the irradiator will be limited (3-4 times), you do not have to go through the approval process, but you will use the irradiator with someone already approved.

If you have been in the US for less than one year, you cannot apply for unescorted access.

Everyone requesting unescorted irradiator access requires a background check and fingerprinting. This process can take up to 60 days.



To begin the approval process:

1.  Email Carl Granlund at with the following information:
Name, email, lab, principal investigator, and start date of employment with Johns Hopkins.


2.  You will be emailed directions for completing an online security check.


3.  You will be notified by email when the next fingerprint session is scheduled (one session per month).

When your background check and your FBI fingerprints/history are completed, you will be notified by email regarding your approval. If you have questions on the approval process please contact Carl Granlund, Radiation Control Unit at (443 28)7-7303.

A dosimeter (radiation monitoring badge) is not needed to enter irradiator rooms or to use irradiators. There is a permanently assigned dosimeter inside each irradiator room

Radiation Badge Monitor Application
(only for x-ray irradiators Small Animal Radiation Research Platform or Xstrahl Biological Irradiator)


Radiation Badge Monitor Application






Name Role Phone Email Location
Esteban Velarde
Core Manager

John Wong
Resource Director

Elwood Armour

Marikki Laiho


Price List

Search available services: View: by category alphabetically
Administrative Fee (1)

Members at Mid-Atlantic Shared Services Consortium

Core Name Primary Contact Email Phone Number/Ext
Biostatistics and Bioinformatics Shared Service

State-of-the-art statistical science, expert statistical analysis and sound statistical reporting

Susan Holt (410) 706-8505
Confocal Microscopy Core

Equipment and expertise to assist investigators in applying advanced fluorescence microscopy techniques to their research.

Joseph Mauban, PhD 410-706-6170
Core for Translational Research in Imaging (CTRIM)

State-of-the-art technology for animal imaging at the molecular, cellular and systemic level. Services for in-vivo and ex-vivo cross-sectional and functional imaging using MRI, MR-g-FUS, PET, and CT.

Jiachen Zhuo (410) 328-6443
Electron Microscopy Core Imaging Facility

‌‌‌‌‌Transmission Electron Microscope, Scanning Electron Microscope, SEM CryoTransfer & Chamber, High Pressure Freezer, Freeze Substitution System, Grid Plunger, CryoUltramicrotome, Gatan 626 cryo holder

Ru-Ching Hsia, PhD 410-7067992
Flow Cytometry Core

Sample acquisition on three analytical flow cytometers, expert data analysis, experimental planning and consultation and perform cell sorting on two high speed cell sorters.</p>

Karen Underwood, BS 410-706-2173
Genomics Core Facility - Formerly Biopolymer Core Facility

DNA Sequencing, Cell Line Authentication, Gene Expression Microarray, Genotyping and more

Nicholas Ambulos, PhD 410-706-60665
Mass Spectrometry Center

Strives to accelerate discovery by providing investigators, on campus and beyond, access to cutting-edge technologies in mass spectrometry. Expetise from basic biology and medicine to technology development and translational research

Maureen A. Kane 410-706-5097
Pathology Biorepository Shared Service (PBSS)

Provides the collection of high quality banked patient samples while maintaining patient confidentiality. PBSS also provides pathology, histology, & histotechnology consultation services to assist principal investigators in the procurement, analyses, & clinicopathologic correlation of human tissue

Ashley Cellini, P.A. (ASCP) 410-706-2174
Translational Laboratory Shared Service (UMGCC)

Pre-clinical and clinical experimental support to basic researchers and physicians. We work in areas across the entire spectrum: cell biology, in vitro, in vivo and human trials.

Rena Lapidus, PhD 410-328-8092
Core Name Primary Contact Email Phone Number/Ext
Non-iLab, JHU SKCCC Core Facilities

Jeff Smith
SKCCC IRAT Core (Image Response Assessment Team)

Michael Jacobs
SKCCC Immune Monitoring Core (formerly Human Immunology)

Christopher Thoburn 410-955-8568
SKCCC Specimen Accessioning Core

Robin Stewart 410 502-0674
SKCCC Analytical Pharmacology Core

Michelle Rudek 410-614-6321
SKCCC Animal Resources

Eric Davis 410-502-9544
SKCCC Cell Imaging Facility

Lillian Dasko-Vincent 410-614-4414
SKCCC Common Equipment Core

Eric Davis
SKCCC Cytogenetics Core Facility

Laura Morsberger
SKCCC Experimental Irradiator Core

Esteban Velarde
SKCCC Flow Cytometry Core

Julie Nauroth 443-287-3952
SKCCC Microarray Core

Wayne Yu 410-502-7970
SKCCC Next Generation Sequencing Core

Lauren Ciotti 443-287-7341

University of Virginia

Core Name Primary Contact Email Phone Number/Ext
Advanced Microscopy Facility Stacey Criswell 434-924-2524
BioNMR Facility
Biomolecular Analysis Facility
Biorepository and Tissue Research Facility (BTRF) Craig Rumpel, MS 434-982-6453
Flow Cytometry Core Facility FCCF Core Email
Genetically Engineered Murine Model (GEMM) Core
Merry X-Ray Leslie Yowell (434) 243-6051
Metabolomics Lipidomics Shared Resource Todd Fox 434-297-6516
MolMart & Tissue Culture Facility Linda Beggerly 434 924 9211
Molecular Electron Microscopy Core Kelly Dryden 434.982.0525
Molecular Imaging Core Jack Roy (434) 243-9232
Office of Research Core Administration Alicia Johnson 434-982-6565
SOM Clinical Research Unit (CRU)
Stem Cell Core Arazdordi Toumadje 434-297-5302
Surgical Skills Training Center Dana Davis Sikon 434-924-6854

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