10
DLD4040 R2.55 & R3.54 Manual | Surface Concept GmbH
Be sure that all voltages are settled to zero before connecting the high voltage cables to
the detector, otherwise serious damage to the detector can occur due to high voltage
sparks.
• Use the SHV cables to connect the corresponding outputs of the high voltage power supply (“MCP-F”,
“MCP-B”, and “U_DLD”) to the corresponding feedthroughs of the detector.
• Terminate the external reference input “HV Ref. In” of the high voltage power supply with the SHV
termination plug (part of the delivery). Later on also a reference voltage (e.g. the column potential in an
electron microscope or the Herzog potential in an electron spectrometer) can be applied to the front
side of the MCP stack of the detector as well as to the high voltage power supply (see the manual for
the high voltage power supply for more details).
• In case that a Surface Concept HV Supply is part of the delivery, the MCP-F potential is connected to
the external reference input “HV Ref. In” of the HVPS. In this case the SHV termination plug is used to
terminate the external reference input. See the manual for the high voltage power supply for more
detailed information.
In cases that no reference voltage is applied to the MCP front, the termination plug must
be used to ground the MCP front. Otherwise the MCP stack is not functioning as the
reference potential is missing.
The exact operation voltage of the detector is given in the specification sheet. It is given
in reference to the “MCP-F” (= “HV Ref. In”) potential.
Note
• The pulse processing unit ACU can be connected directly to the DLD 4-fold SMB feedthrough. The
metal pin gives the orientation. Fasten the ACU with the two clips on the housing.
Hold the ACU straight and plug it very carefully.
The middle pins of the SMB connectors in the 4-fold SMB feedthrough can be damaged
when holding the ACU not straight while plugging.
• Use the DLD readout cable to connect the “Lines Out” socket on the front of the ACU with the “TDC
Input” socket at the rear panel of the TDC (see the TDC manual for the specific connection scheme of
the TDC).
• The CF160 base flange holds one CF40 flange with three SHV feedthroughs, the CF100 base flange
holds three CF16 flanges with one SHV feedthrough each for the high voltage supply of the detector
named “MCP-F”, “MCP-B” and “U_DLD”. The naming can be found directly engraved on the CF40 flange.
“MCP-F” is the contact to the front side of the MCP stack, “MCP-B” is the contact to the back side of the
MCP stack and “U_DLD” is connected to the detector anode.
