4.2. Detector Control Unit
4.2.1. Configuration
Please do not install or run any other software on the computer, except tools and software which are necessary for config-
uring your data acquisition protocol.
The detector control unit is set up with a standard installation of the CentOS 6.x distribution. Regular system updates can
be made. However, to avoid operational deterioration do not update the system while the detector is taking data.
Caution
#8
Do not remove the symbolic link in the directory
~/p2_det/images
, which points to the
images
directory.
Please do not change the configuration of the Ethernet adapter em2.
The DCU has two onboard 1 Gbit Ethernet adapters:
• em1, labeled as Gb1, can be used to connect to the local network or Internet. By default it is configured for DHCP.
• em2, labeled as Gb2, is reserved for the detector and set to a static IP address (10.0.11.1). Furthermore, the startup
script /etc/rc.local disables ARP for em2. Do not change this!
Note: ARP is re-enabled if the network service has been restarted. In this case execute the startup script /etc/rc.local as
super user or reboot the system. To assure stable operation of the detector system the configuration file /etc/sysctl.conf is
changed such that the Ethernet rx and tx buffers are larger than the standard setting.
The firewall and SE Linux are disabled by default (otherwise the following ports must be open for UDP: 52010, 52011,
52012). The following firewall port must be open if you want to connect to Camserver with a TCP/IP socket connection from
the outside: 41234
4.2.2. Samba Share
There is a Samba share configured on the detector PC. The Samba service is enabled by default and running after the
system boots.
The storage directory for the images,/home/det/p2_ det/images, which is a symbolic link to /home/det/images, can be
accessed from a Samba client. You need the same user name and password as for the normal console or ssh login.
From a Linux or Mac OSX terminal window issue the following command:
smbclient
server-ip-or-hostname/images -U det
To browse the Samba share from Windows, type
in the Windows Explorer address bar.
4.3. Thermal Stabilization Unit
A thermal stabilization unit is required for the operation of the PILATUS3 R CdTe 100K-M detector system.
The hoses and the detector are equipped with self-sealing valves to avoid dripping when connecting or disconnecting the
tubes.
There is no fixed limitation on the length of the tubing, but it should be kept as short as possible to ensure the best flow.
Table 4.5:
In-air operating conditions
Condition
Definition
Operating temperature
The thermal stabilization unit has to be set to a temperature
of 25
◦
C for normal operation.
Maximum operating pressure
3 bar
PILATUS3 R CdTe 100K-M Technical Specifications v1.0.0
16 | 29
