Jupiter has a very intense radiation field, and thus spacecraft going to study it need heavy radiation shielding, such as Juno's radiation vault. This protects the delicate instruments and electronics. However, Juno needs the shielding because it passes by Jupiter very closely, and is exposed to the full brunt of the radiation. Would a lander on Europa need similar protection, or is Europa sufficiently far away and/or have a thick enough atmosphere that it would not need as much shielding?
EDIT: This question has drawn some conflicting answers. The fact that a lander would have shielding from the moon and that it is always in the intense radiation environment made me feel unsure of which was more important. If someone could make a more detailed answer including both facts, perhaps mathematically, I would appreciate it.
Also, wouldn't Europa's magnetic field help deflect some of the radiation? After all, most of the radiation present in the belts is just charged particles.