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--- facilities:irradiation:chipir [22:19 02/06/2022] – jhulsman
+++ facilities:irradiation:chipir [22:31 02/06/2022] (current) – [Beam Parameters] jhulsman
@@ Line 8: / Line 8: @@
 ^ Beam Source ^ Particle Type ^ Flux ($cm^{-2} s^{-1}$) ^ Energy ^ Notes ^
-| Proton Spallation | neutron | $5\times 10^{6}$ | 10-800 | |
+| Proton Spallation | neutron | $5\times 10^{6}$ | 10-800 MeV| |
 ===== Facility =====
@@ Line 16: / Line 16: @@
 Neutrons are produce by accelerating protons up to 800 MeV. These are then injected into a tungsten target, producing secondary neutrons. Through hydrogenous moderators to a variety of instruments the neutron spectrum simultaneously includes thermal and cold  neutrons. The fast neutron beamline is extracted through the addition of a new channel in the beryllium reflector. Neutrons from this channel illuminate a secondary scatterer made to optimize the hard atmospheric-like neutron spectrum. With an independent shutter the neutron beam can be closed and opened while the accelerator is running. The schematic is shown below.
-{{ :facilities:irradiation:chipir:chipir_schematic.png?direct&600 | Schematics of the components needed to produce the atmospheric neutron beam. }}
+{{ :facilities:irradiation:chipir:chipir_schematic.png?direct&800 | Schematics of the components needed to produce the atmospheric neutron beam. }}
+===== Neutron Spectrum =====
+The resulting neutron spectrum look like the figure below.
+{{ :facilities:irradiation:chipir:neutron_spectrum.jpg?direct&800 |ChipIr neutron spectrum}}
+===== Beam Profile =====
+The collimator system provides flexibility with respect to the beam size. The beam size ranges from 1m x 1m down to a few $cm^2$. The figure below shows the beam uniformity profile for a beam size of 70mm x 70mm (typical order of magnitude for electronics size). As shown below, the beam is mostly uniform within the 2% level.
+{{ :facilities:irradiation:chipir:beam_profile.jpg?direct&600 |Map of the 70 × 70 mm2 ChipIr beam measured with a Diamond Detector}}